Update 'actions/cache@v2' to 'actions/cache@v3' (#57)

Author: Denis-Averin

.github/workflows/php-versions.yml

@@ -18,7 +18,7 @@ jobs:
 
     - name: Cache Composer packages
       id: composer-cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: vendor
         key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}