all: add Go 1.21, drop 1.19

.github/workflows/test.yml

@@ -4,8 +4,8 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.19.x, 1.20.x]
-        os: [ubuntu-latest, macos-11, windows-latest]
+        go-version: [1.20.x, 1.21.x]
+        os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/setup-go@v3
@@ -17,7 +17,7 @@ jobs:
 
     # Static checks from this point forward. Only run on one Go version and on
     # Linux, since it's the fastest platform, and the tools behave the same.
-    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.20.x'
+    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.21.x'
       run: diff <(echo -n) <(gofmt -s -d .)
-    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.20.x'
+    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.21.x'
       run: go vet ./...

cmd/xurls/main.go

@@ -273,7 +273,7 @@ func readVersion() string {
 
 	// Until https://github.com/golang/go/issues/50603 is implemented,
 	// manually construct something like a pseudo-version.
-	// TODO: remove when this code is dead, hopefully in Go 1.20.
+	// TODO: remove when this code is dead, hopefully in Go 1.22.
 	if mod.Version == "(devel)" {
 		var vcsTime time.Time
 		var vcsRevision string

go.mod

@@ -1,6 +1,6 @@
 module mvdan.cc/xurls/v2
 
-go 1.19
+go 1.20
 
 require (
 	github.com/rogpeppe/go-internal v1.10.0