bump Go versions and CI action versions

.github/workflows/test.yml

@@ -4,21 +4,21 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.18.x, 1.19.x]
+        go-version: [1.20.x, 1.21.x]
         # TODO: os: [ubuntu-latest, macos-latest, windows-latest]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/setup-go@v3
+    - uses: actions/setup-go@v4
       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 == '1.19.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 == '1.19.x'
+    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.21.x'
       run: go vet ./...

go.mod

@@ -1,6 +1,6 @@
 module github.com/mdempsky/unconvert
 
-go 1.18
+go 1.20
 
 require (
 	golang.org/x/text v0.13.0