ci: Ensure we always check for latest version of Go (#4703)

* ci: Ensure we always check for latest version of Go

* Try to force 1.18.1, 1.17.9

* Use includes for the actual go semver

* Use `~` for semver here, apparently

* Try to make tests still run on 1.18.0 for Mac, for now

4 files changed, 36 insertions, 5 deletions

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 424b5dd19..bc9e0a0c8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,10 +21,23 @@ jobs:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
         go: [ '1.17', '1.18' ]
 
+        include:
+        # Set the minimum Go patch version for the given Go minor
+        # Usable via ${{ matrix.GO_SEMVER }}
+        - go: '1.17'
+          GO_SEMVER: '~1.17.9'
+
+        - go: '1.18'
+          GO_SEMVER: '~1.18.1'
+
+        # Go 1.18.1 isn't released yet for Mac as of Apr 13 2022
+        - go: '1.18'
+          os: 'macos-latest'
+          GO_SEMVER: '1.18.0'
+
         # Set some variables per OS, usable via ${{ matrix.VAR }}
         # CADDY_BIN_PATH: the path to the compiled Caddy binary, for artifact publishing
         # SUCCESS: the typical value for $? per OS (Windows/pwsh returns 'True')
-        include:
         - os: ubuntu-latest
           CADDY_BIN_PATH: ./cmd/caddy/caddy
           SUCCESS: 0
@@ -43,7 +56,8 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v3
       with:
-        go-version: ${{ matrix.go }}
+        go-version: ${{ matrix.GO_SEMVER }}
+        check-latest: true
 
     - name: Checkout code
       uses: actions/checkout@v3
diff --git a/.github/workflows/cross-build.yml b/.github/workflows/cross-build.yml
index 04c1d29af..3ac9548f5 100644
--- a/.github/workflows/cross-build.yml
+++ b/.github/workflows/cross-build.yml
@@ -17,13 +17,21 @@ jobs:
       matrix:
         goos: ['android', 'linux', 'solaris', 'illumos', 'dragonfly', 'freebsd', 'openbsd', 'plan9', 'windows', 'darwin', 'netbsd']
         go: [ '1.18' ]
+
+        include:
+        # Set the minimum Go patch version for the given Go minor
+        # Usable via ${{ matrix.GO_SEMVER }}
+        - go: '1.18'
+          GO_SEMVER: '~1.18.1'
+
     runs-on: ubuntu-latest
     continue-on-error: true
     steps:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: ${{ matrix.go }}
+          go-version: ${{ matrix.GO_SEMVER }}
+          check-latest: true
 
       - name: Print Go version and environment
         id: vars
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 7376b9104..0aae61966 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -19,7 +19,8 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v3
         with:
-          go-version: 1.17
+          go-version: '~1.17.9'
+          check-latest: true
 
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 68e231de9..6d0fe7c55 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,13 +12,21 @@ jobs:
       matrix:
         os: [ ubuntu-latest ]
         go: [ '1.18' ]
+
+        include:
+        # Set the minimum Go patch version for the given Go minor
+        # Usable via ${{ matrix.GO_SEMVER }}
+        - go: '1.17'
+          GO_SEMVER: '~1.18.1'
+
     runs-on: ${{ matrix.os }}
 
     steps:
     - name: Install Go
       uses: actions/setup-go@v3
       with:
-        go-version: ${{ matrix.go }}
+        go-version: ${{ matrix.GO_SEMVER }}
+        check-latest: true
 
     - name: Checkout code
       uses: actions/checkout@v3