ci(github): update CI configuration and dependencies

- Update golangci-lint action from v5 to v6
- Update Go versions to test from [1.18, 1.19, "1.20", 1.21, 1.22] to [1.21, 1.22, 1.23]
- Remove macOS from the build matrix

Signed-off-by: appleboy <appleboy.tw@gmail.com>

.github/workflows/go.yml

@@ -23,19 +23,17 @@ 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]
+        go: [1.21, 1.22, 1.23]
         include:
           - os: ubuntu-latest
             go-build: ~/.cache/go-build
-          - os: macos-latest
-            go-build: ~/Library/Caches/go-build
     name: ${{ matrix.os }} @ Go ${{ matrix.go }}
     runs-on: ${{ matrix.os }}
     env: