Merge remote-tracking branch 'mainline/2.3-develop' into MC-19226

Author: Prabhu Ram

composer.json

@@ -84,11 +84,13 @@
     },
     "require-dev": {
         "allure-framework/allure-phpunit": "~1.2.0",
+        "dealerdirect/phpcodesniffer-composer-installer": "^0.5.0",
         "friendsofphp/php-cs-fixer": "~2.14.0",
         "lusitanian/oauth": "~0.8.10",
         "magento/magento-coding-standard": "~4.0.0",
         "magento/magento2-functional-testing-framework": "2.5.0",
         "pdepend/pdepend": "2.5.2",
+        "phpcompatibility/php-compatibility": "^9.3",
         "phpmd/phpmd": "@stable",
         "phpunit/phpunit": "~6.5.0",
         "sebastian/phpcpd": "~3.0.0",