MC-31797: Remove compatibility with PHP 7.1 and 7.2

Author: xmav

dev/tests/integration/testsuite/Magento/Setup/Console/Command/_files/root/app/code/Magento/A/composer.json

@@ -4,7 +4,7 @@
         "sort-packages": true
     },
     "require": {
-        "php": "~7.1.3||~7.2.0||~7.3.0",
+        "php": "~7.3.0||~7.4.0",
         "magento/framework": "0.1",
         "magento/module-b": "0.1"
     },