Fix GitHub Actions

Author: zonuexe

.github/workflows/test.yml

@@ -55,7 +55,7 @@ jobs:
       run: |
         echo "::set-output name=dir::$(composer config cache-files-dir)"
     - name: Cache Composer packages
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: ${{ steps.composer-cache.outputs.dir }}
         key: ${{ runner.os }}-composer