Update actions/cache action to v4

| datasource  | package       | from   | to     |
| ----------- | ------------- | ------ | ------ |
| github-tags | actions/cache | v3.3.2 | v4.0.0 |

.github/workflows/coding-standards.yml

@@ -36,7 +36,7 @@ jobs:
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: "Cache dependencies"
-        uses: "actions/cache@v3.3.2"
+        uses: "actions/cache@v4.0.0"
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-${{ hashFiles('**/composer.lock') }}"

.github/workflows/mutation-tests.yml

@@ -36,7 +36,7 @@ jobs:
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: "Cache dependencies"
-        uses: "actions/cache@v3.3.2"
+        uses: "actions/cache@v4.0.0"
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-${{ hashFiles('**/composer.lock') }}"

.github/workflows/phpunit.yml

@@ -38,7 +38,7 @@ jobs:
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: "Cache dependencies"
-        uses: "actions/cache@v3.3.2"
+        uses: "actions/cache@v4.0.0"
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-${{ hashFiles('**/composer.lock') }}"

.github/workflows/static-analysis.yml

@@ -36,7 +36,7 @@ jobs:
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: "Cache dependencies"
-        uses: "actions/cache@v3.3.2"
+        uses: "actions/cache@v4.0.0"
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-${{ hashFiles('**/composer.lock') }}"