Lock dependencies to PHP 7.4.0

Author: bennothommo

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=7.2",
+        "php": ">=7.4.0",
         "symfony/console": "^4.4.13",
         "symfony/process": "^4.4.13",
         "guzzlehttp/guzzle": "^7.0.1",
@@ -30,11 +30,13 @@
         "post-install-cmd": [
             "composer bin box config minimum-stability dev",
             "composer bin box config prefer-stable true",
+            "composer bin box config platform.php 7.4.0",
             "composer bin box require --dev --no-progress humbug/box"
         ],
         "post-update-cmd": [
             "composer bin box config minimum-stability dev",
             "composer bin box config prefer-stable true",
+            "composer bin box config platform.php 7.4.0",
             "composer bin box require --dev --no-progress humbug/box"
         ]
     },
@@ -43,6 +45,9 @@
     "config": {
         "allow-plugins": {
             "bamarni/composer-bin-plugin": true
+        },
+        "platform": {
+            "php": "7.4.0"
         }
     }
 }