Update actions/cache (#40)

Author: rdss-sknott

.github/workflows/continuous-integration.yml

@@ -25,7 +25,7 @@ jobs:
         run: 'echo "::set-output name=directory::$(npm config get cache)"'
 
       - name: Cache Composer Packages
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-composer
         with:
@@ -35,7 +35,7 @@ jobs:
             ${{ runner.os }}-codestyle-${{ env.cache-name }}-
 
       - name: Cache node modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-node-modules
         with:
@@ -97,7 +97,7 @@ jobs:
         run: 'echo "::set-output name=directory::$(npm config get cache)"'
 
       - name: Cache Composer Packages
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-composer
           matrix-entries: ${{ matrix.composer_version }}-${{ matrix.composer_parameters }}
@@ -108,7 +108,7 @@ jobs:
             ${{ runner.os }}-tests-${{ env.cache-name }}-${{ env.matrix-entries }}-
 
       - name: Cache node modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-node-modules
         with: