Update codebase to PHP 7.4 (#21)

Author: TavoNiievez

.github/workflows/symfony.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php-versions: ['7.3', '7.4', '8.0']
+        php-versions: ['7.4', '8.0', '8.1']
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -56,5 +56,4 @@ jobs:
         run: php bin/console d:f:l -q
 
       - name: Run functional tests
-        run: |
-          vendor/bin/codecept run Functional
+        run: vendor/bin/codecept run Functional

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=7.3.0",
+        "php": ">=7.4.0",
         "ext-ctype": "*",
         "ext-iconv": "*",
         "doctrine/doctrine-bundle": "^2.4",
@@ -55,7 +55,7 @@
         },
         "sort-packages": true,
         "platform": {
-            "php": "7.3.0"
+            "php": "7.4.0"
         }
     },
     "autoload": {