drop Go 1.20, test on Go 1.22

.github/workflows/test.yml

@@ -4,20 +4,20 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.20.x, 1.21.x]
+        go-version: [1.21.x, 1.22.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/setup-go@v3
+    - uses: actions/setup-go@v5
       with:
         go-version: ${{ matrix.go-version }}
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: go test ./...
     - run: go test -race ./...
 
     # 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 == '1.21.x'
+    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.22.x'
       run: diff <(echo -n) <(gofmt -s -d .)
-    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.21.x'
+    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.22.x'
       run: go vet ./...

go.mod

@@ -1,6 +1,6 @@
 module mvdan.cc/gofumpt
 
-go 1.20
+go 1.21
 
 require (
 	github.com/frankban/quicktest v1.14.6

testdata/script/gomod.txtar

@@ -1,7 +1,5 @@
 # Test various edge cases with go.mod files.
 
-[!go1.21] skip 'Go 1.20 or older cannot parse these go.mod files'
-
 exec gofumpt toolchain-stable/a.go
 stdout '//gofumpt:diagnose.* -lang=v1.21'