ci: Test against Go 1.21 and 1.22 (#43)

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     - uses: actions/setup-go@v5
       name: Set up Go
       with:
-        go-version: 1.20.x
+        go-version: 1.22.x
         cache: false
     - uses: golangci/golangci-lint-action@v3
       name: Install golangci-lint
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: ["1.20.x", "1.21.x"]
+        go: ["1.21.x", "1.22.x"]
 
     steps:
     - uses: actions/checkout@v4

go.mod

@@ -1,6 +1,6 @@
 module go.abhg.dev/goldmark/anchor
 
-go 1.19
+go 1.20
 
 require (
 	github.com/stretchr/testify v1.8.1

transform_test.go

@@ -202,7 +202,7 @@ func TestTransform_noHeadingIDs(t *testing.T) {
 	src := []byte("# Foo\n\n# Bar\n\n# Baz\n")
 	got := p.Parse(text.NewReader(src))
 
-	err := ast.Walk(got, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
+	err := ast.Walk(got, func(n ast.Node, _ bool) (ast.WalkStatus, error) {
 		an, ok := n.(*Node)
 		assert.False(t, ok, "unexpected Node: %#v", an)
 		return ast.WalkContinue, nil