Updated PHP version

Author: mahdiyazdani

.github/workflows/php-coding-standards.yml

@@ -43,7 +43,7 @@ jobs:
             - name: Set up PHP
               uses: shivammathur/setup-php@v2
               with:
-                  php-version: '7.3'
+                  php-version: '7.4'
                   coverage: none
                   tools: composer, cs2pr