github: Bump GitHub actions versions

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Install Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
           go-version: ${{ matrix.go-version }}
       - name: Install staticcheck
@@ -25,7 +25,7 @@ jobs:
         run: echo "$(go env GOPATH)/bin" >> $GITHUB_PATH
         shell: bash
       - name: Checkout code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v3
       - name: Fmt
         if: matrix.platform != 'windows-latest' # :(
         run: "diff <(gofmt -d .) <(printf '')"