ci: update CI configuration for Go versions and GitHub actions

- Update golangci-lint action to version 6
- Add macOS to the OS matrix
- Remove Go versions 1.18, 1.19, and 1.20 from the matrix
- Add Go version 1.23 to the matrix
- Update Codecov action to version 5

Signed-off-by: appleboy <[email protected]>

Author: appleboy

.github/workflows/go.yml

@@ -23,14 +23,14 @@ jobs:
           go-version-file: go.mod
           check-latest: true
       - name: Setup golangci-lint
-        uses: golangci/golangci-lint-action@v5
+        uses: golangci/golangci-lint-action@v6
         with:
           args: --verbose
   test:
     strategy:
       matrix:
-        os: [ubuntu-latest]
-        go: [1.18, 1.19, "1.20", 1.21, 1.22]
+        os: [ubuntu-latest, macos-latest]
+        go: [1.21, 1.22, 1.23]
         include:
           - os: ubuntu-latest
             go-build: ~/.cache/go-build
@@ -65,6 +65,6 @@ jobs:
           go test -v -covermode=atomic -coverprofile=coverage.out
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           flags: ${{ matrix.os }},go-${{ matrix.go }}