fix CI

Author: LordSimal

.github/workflows/ci.yml

@@ -15,10 +15,13 @@ jobs:
       fail-fast: false
       matrix:
         php-version: ['7.2', '7.4', '8.0']
-        prefer-lowest: ['']
+        dependencies: [highest]
+        ignore-platform-reqs: [false]
         include:
           - php-version: '7.2'
-            prefer-lowest: 'prefer-lowest'
+            dependencies: 'lowest'
+          - php-version: '8.0'
+            ignore-platform-reqs: true
 
     steps:
     - uses: actions/checkout@v2
@@ -30,29 +33,8 @@ jobs:
         extensions: mbstring, intl
         coverage: pcov
 
-    - name: Get composer cache directory
-      id: composer-cache
-      run: echo "::set-output name=dir::$(composer config cache-files-dir)"
-
-    - name: Get date part for cache key
-      id: key-date
-      run: echo "::set-output name=date::$(date +'%Y-%m')"
-
-    - name: Cache composer dependencies
-      uses: actions/cache@v1
-      with:
-        path: ${{ steps.composer-cache.outputs.dir }}
-        key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}-${{ matrix.prefer-lowest }}
-
-    - name: Composer Install
-      run: |
-        if [[ ${{ matrix.php-version }} == '8.0' ]]; then
-          composer install --ignore-platform-reqs
-        elif ${{ matrix.prefer-lowest == 'prefer-lowest' }}; then
-          composer update --prefer-lowest --prefer-stable
-        else
-          composer install
-        fi
+    - name: Composer install
+      uses: ramsey/composer-install@v3
 
     - name: Setup problem matchers for PHPUnit
       if: matrix.php-version == '7.4'
@@ -82,22 +64,12 @@ jobs:
         tools: cs2pr
         coverage: none
 
-    - name: Get composer cache directory
-      id: composer-cache
-      run: echo "::set-output name=dir::$(composer config cache-files-dir)"
-
-    - name: Get date part for cache key
-      id: key-date
-      run: echo "::set-output name=date::$(date +'%Y-%m')"
-
-    - name: Cache composer dependencies
-      uses: actions/cache@v1
-      with:
-        path: ${{ steps.composer-cache.outputs.dir }}
-        key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}-${{ matrix.prefer-lowest }}
-
     - name: Composer install
-      run: composer install
+      uses: ramsey/composer-install@v3
+      with:
+        dependency-versions: ${{ matrix.dependencies }}
+        composer-options: >-
+          ${{ matrix.ignore-platform-reqs && '--ignore-platform-reqs' || '' }}
 
     - name: Run PHP CodeSniffer
       run: vendor/bin/phpcs --report=checkstyle CakePHP/ | cs2pr