ci: update from Node.js 16 to Node.js 18

Node.js 16 is no longer supported, so we can drop support for it as
well.

This also means updating a whole lot of GitHub Actions versions, because
they were updated to work on Node.js 20 instead. For most actions this
should be a relatively small change, but the upload-aftifact action has
had some major changes (which should generally improve things a lot).

6 files changed, 59 insertions, 59 deletions

diff --git a/.github/workflows/build-macos.yml b/.github/workflows/build-macos.yml
index 578fe706d..23150ef33 100644
--- a/.github/workflows/build-macos.yml
+++ b/.github/workflows/build-macos.yml
@@ -35,12 +35,12 @@ jobs:
         with:
           submodules: true
       - name: Install Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: true
       - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
           key: llvm-source-17-${{ matrix.os }}-v1
@@ -54,7 +54,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save LLVM source cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -65,7 +65,7 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore LLVM build cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
           key: llvm-build-17-${{ matrix.os }}-v1
@@ -83,13 +83,13 @@ jobs:
           make llvm-build
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Save LLVM build cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
       - name: Cache wasi-libc sysroot
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-wasi-libc
         with:
           key: wasi-libc-sysroot-${{ matrix.os }}-v1
@@ -116,7 +116,7 @@ jobs:
         # - have a double-zipped artifact when downloaded from the UI
         # - have a very slow artifact upload
         # We're doing the former here, to keep artifact uploads fast.
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: darwin-${{ matrix.goarch }}-double-zipped
           path: build/tinygo.darwin-${{ matrix.goarch }}.tar.gz
@@ -143,7 +143,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: true
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index fc2f9ae1f..a6fabbb5d 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -21,7 +21,7 @@ jobs:
       image: golang:1.21-alpine
     steps:
       - name: Install apk dependencies
-        # tar: needed for actions/cache@v3
+        # tar: needed for actions/cache@v4
         # git+openssh: needed for checkout (I think?)
         # ruby: needed to install fpm
         run: apk add tar git openssh make g++ ruby
@@ -33,14 +33,14 @@ jobs:
         with:
           submodules: true
       - name: Cache Go
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           key: go-cache-linux-alpine-v1-${{ hashFiles('go.mod') }}
           path: |
             ~/.cache/go-build
             ~/go/pkg/mod
       - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
           key: llvm-source-17-linux-alpine-v1
@@ -54,7 +54,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save LLVM source cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -65,7 +65,7 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore LLVM build cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
           key: llvm-build-17-linux-alpine-v1
@@ -83,13 +83,13 @@ jobs:
           # Remove unnecessary object files (to reduce cache size).
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Save LLVM build cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
       - name: Cache Binaryen
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-binaryen
         with:
           key: binaryen-linux-alpine-v1
@@ -100,7 +100,7 @@ jobs:
           apk add cmake samurai python3
           make binaryen STATIC=1
       - name: Cache wasi-libc
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-wasi-libc
         with:
           key: wasi-libc-sysroot-linux-alpine-v2
@@ -119,7 +119,7 @@ jobs:
           cp -p build/release.tar.gz /tmp/tinygo.linux-amd64.tar.gz
           cp -p build/release.deb    /tmp/tinygo_amd64.deb
       - name: Publish release artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: linux-amd64-double-zipped
           path: |
@@ -133,7 +133,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: true
@@ -144,7 +144,7 @@ jobs:
           tar -C $HOME/.wasmtime/bin --wildcards -xf wasmtime-v14.0.4-x86_64-linux.tar.xz --strip-components=1 wasmtime-v14.0.4-x86_64-linux/*
           echo "$HOME/.wasmtime/bin" >> $GITHUB_PATH
       - name: Download release artifact
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: linux-amd64-double-zipped
       - name: Extract release tarball
@@ -176,14 +176,14 @@ jobs:
               simavr \
               ninja-build
       - name: Install Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: true
       - name: Install Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '16'
+          node-version: '18'
       - name: Install wasmtime
         run: |
           mkdir -p $HOME/.wasmtime $HOME/.wasmtime/bin
@@ -191,7 +191,7 @@ jobs:
           tar -C $HOME/.wasmtime/bin --wildcards -xf wasmtime-v14.0.4-x86_64-linux.tar.xz --strip-components=1 wasmtime-v14.0.4-x86_64-linux/*
           echo "$HOME/.wasmtime/bin" >> $GITHUB_PATH
       - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
           key: llvm-source-17-linux-asserts-v1
@@ -205,7 +205,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save LLVM source cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -216,7 +216,7 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore LLVM build cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
           key: llvm-build-17-linux-asserts-v1
@@ -232,13 +232,13 @@ jobs:
           # Remove unnecessary object files (to reduce cache size).
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Save LLVM build cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
       - name: Cache Binaryen
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-binaryen
         with:
           key: binaryen-linux-asserts-v1
@@ -247,7 +247,7 @@ jobs:
         if: steps.cache-binaryen.outputs.cache-hit != 'true'
         run: make binaryen
       - name: Cache wasi-libc
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-wasi-libc
         with:
           key: wasi-libc-sysroot-linux-asserts-v6
@@ -299,12 +299,12 @@ jobs:
               g++-${{ matrix.toolchain }} \
               libc6-dev-${{ matrix.libc }}-cross
       - name: Install Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: true
       - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
           key: llvm-source-17-linux-v1
@@ -318,7 +318,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save LLVM source cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -329,7 +329,7 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore LLVM build cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
           key: llvm-build-17-linux-${{ matrix.goarch }}-v1
@@ -347,13 +347,13 @@ jobs:
           # Remove unnecessary object files (to reduce cache size).
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Save LLVM build cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
       - name: Cache Binaryen
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-binaryen
         with:
           key: binaryen-linux-${{ matrix.goarch }}-v3
@@ -373,7 +373,7 @@ jobs:
         run: |
           make CROSS=${{ matrix.toolchain }}
       - name: Download amd64 release
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: linux-amd64-double-zipped
       - name: Extract amd64 release
@@ -390,7 +390,7 @@ jobs:
           cp -p build/release.tar.gz /tmp/tinygo.linux-${{ matrix.goarch }}.tar.gz
           cp -p build/release.deb    /tmp/tinygo_${{ matrix.libc }}.deb
       - name: Publish release artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: linux-${{ matrix.goarch }}-double-zipped
           path: |
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 71c25360f..90695cebc 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -21,7 +21,7 @@ jobs:
         run: |
             git submodule update --init lib/musl
       - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
           key: llvm-source-17-linux-nix-v1
@@ -31,7 +31,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save LLVM source cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
diff --git a/.github/workflows/sizediff.yml b/.github/workflows/sizediff.yml
index c3db3811d..c9c027bf0 100644
--- a/.github/workflows/sizediff.yml
+++ b/.github/workflows/sizediff.yml
@@ -25,7 +25,7 @@ jobs:
       - name: Install apt dependencies
         run: ./.github/workflows/sizediff-install-pkgs.sh
       - name: Restore LLVM source cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-llvm-source
         with:
           key: llvm-source-17-sizediff-v1
@@ -35,7 +35,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Cache Go
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           key: go-cache-linux-sizediff-v1-${{ hashFiles('go.mod') }}
           path: |
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 65a232c58..dcca24f98 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: windows-2022
     steps:
       - name: Configure pagefile
-        uses: al-cheb/[email protected]
+        uses: al-cheb/[email protected]
         with:
           minimum-size: 8GB
           maximum-size: 24GB
@@ -33,12 +33,12 @@ jobs:
         with:
           submodules: true
       - name: Install Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: true
       - name: Restore cached LLVM source
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
           key: llvm-source-17-windows-v1
@@ -52,7 +52,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save cached LLVM source
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -63,7 +63,7 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore cached LLVM build
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
           key: llvm-build-17-windows-v1
@@ -80,13 +80,13 @@ jobs:
           # Remove unnecessary object files (to reduce cache size).
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Save cached LLVM build
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
       - name: Cache wasi-libc sysroot
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-wasi-libc
         with:
           key: wasi-libc-sysroot-v5
@@ -116,7 +116,7 @@ jobs:
         # - have a dobule-zipped artifact when downloaded from the UI
         # - have a very slow artifact upload
         # We're doing the former here, to keep artifact uploads fast.
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: windows-amd64-double-zipped
           path: build/release/release.zip
@@ -126,7 +126,7 @@ jobs:
     needs: build-windows
     steps:
       - name: Configure pagefile
-        uses: al-cheb/[email protected]
+        uses: al-cheb/[email protected]
         with:
           minimum-size: 8GB
           maximum-size: 24GB
@@ -141,12 +141,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: true
       - name: Download TinyGo build
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: windows-amd64-double-zipped
           path: build/
@@ -163,7 +163,7 @@ jobs:
     needs: build-windows
     steps:
       - name: Configure pagefile
-        uses: al-cheb/[email protected]
+        uses: al-cheb/[email protected]
         with:
           minimum-size: 8GB
           maximum-size: 24GB
@@ -171,12 +171,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: true
       - name: Download TinyGo build
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: windows-amd64-double-zipped
           path: build/
@@ -192,7 +192,7 @@ jobs:
     needs: build-windows
     steps:
       - name: Configure pagefile
-        uses: al-cheb/[email protected]
+        uses: al-cheb/[email protected]
         with:
           minimum-size: 8GB
           maximum-size: 24GB
@@ -207,12 +207,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: true
       - name: Download TinyGo build
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: windows-amd64-double-zipped
           path: build/
diff --git a/GNUmakefile b/GNUmakefile
index c5cfb3ccd..bf23397df 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -269,14 +269,14 @@ lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a:
 
 # Check for Node.js used during WASM tests.
 NODEJS_VERSION := $(word 1,$(subst ., ,$(shell node -v | cut -c 2-)))
-MIN_NODEJS_VERSION=16
+MIN_NODEJS_VERSION=18
 
 .PHONY: check-nodejs-version
 check-nodejs-version:
 ifeq (, $(shell which node))
-	@echo "Install NodeJS version 16+ to run tests."; exit 1;
+	@echo "Install NodeJS version 18+ to run tests."; exit 1;
 endif
-	@if [ $(NODEJS_VERSION) -lt $(MIN_NODEJS_VERSION) ]; then echo "Install NodeJS version 16+ to run tests."; exit 1; fi
+	@if [ $(NODEJS_VERSION) -lt $(MIN_NODEJS_VERSION) ]; then echo "Install NodeJS version 18+ to run tests."; exit 1; fi
 
 # Build the Go compiler.
 tinygo: