ci: update Go to 1.22

.cirrus.yml

@@ -1,6 +1,6 @@
 env:
   CIRRUS_CLONE_DEPTH: 1
-  GO_VERSION: go1.21.5
+  GO_VERSION: go1.22.0
 
 freebsd_13_task:
   freebsd_instance:

.github/workflows/static-analysis.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491
       with:
-        go-version: '1.21'
+        go-version: '1.22'
 
     - name: Check out code
       uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11

.github/workflows/test.yml

@@ -12,7 +12,8 @@ jobs:
   build-and-test:
     strategy:
       matrix:
-        go-version: ['1.19', '1.20', '1.21']
+        # Oldest supported version is 1.19, plus the latest two releases.
+        go-version: ['1.19', '1.21', '1.22']
         os: [ubuntu-20.04, ubuntu-22.04, macos-11, macos-12, macos-13, macos-14, windows-2019, windows-2022]
     runs-on: ${{ matrix.os }}
 
@@ -26,11 +27,11 @@ jobs:
       uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
 
     - name: Check formatting
-      if: ${{ matrix.go-version == '1.21' && matrix.os == 'ubuntu-22.04' }}
+      if: ${{ matrix.go-version == '1.22' && matrix.os == 'ubuntu-22.04' }}
       run: diff -u <(echo -n) <(gofmt -d .)
 
     - name: Check Go modules
-      if: ${{ matrix.go-version == '1.21' && matrix.os == 'ubuntu-22.04' }}
+      if: ${{ matrix.go-version == '1.22' && matrix.os == 'ubuntu-22.04' }}
       run: |
         go mod tidy
         git diff --exit-code