Increasing max PHP version to PHP 7.4

Author: escopecz

UPGRADE-3.0.md

@@ -1,7 +1,7 @@
 # User facing changes
 
 *   {leadfield=...} tokens were removed. Use {contactfield=...} tokens instead.
-*   Supported PHP versions are 7.2 and 7.3
+*   Supported PHP versions are 7.2, 7.3 and 7.4
 *   Console was moved to another directory. Update all your cron job and replace app/console with bin/console
 *   There is a new file manager. You can see it when you go to a WYSIWYG editor and try to add an image for example.
 *   The Rackspace and OpenStack plugins for remote assets were removed due to outdated library from Rackspace.
@@ -13,7 +13,7 @@
 
 # Backwards compatibility breaking changes
 
-*   Minimal PHP version was increased from v5.6.19 to v7.2.0.
+*   Minimal PHP version was increased from v5.6.19 to v7.2.21.
 *   Minimal MySQL version was increased from v5.5.3 to v5.7.14
 *   Symfony deprecations were removed or refactored [https://github.com/symfony/symfony/blob/3.0/UPGRADE-3.0.md](https://github.com/symfony/symfony/blob/3.0/UPGRADE-3.0.md)
 *   Migrating the database should be done by upgrading to the latest 2.x series then to M3 as all 2.x migrations have been removed from the 3.x code

app/release_metadata.json

@@ -2,7 +2,7 @@
   "version": "3.1.2-rc",
   "stability": "rc",
   "minimum_php_version": "7.2.21",
-  "maximum_php_version": "7.3.99",
+  "maximum_php_version": "7.4.99",
   "minimum_mautic_version": "3.0.0-alpha",
   "announcement_url": ""
 }

composer.json

@@ -15,7 +15,7 @@
         ]
     },
     "require": {
-        "php": ">=7.2.21 <7.4",
+        "php": ">=7.2.21 <7.5",
         "ext-zlib": "^7.2",
         "ext-zip": "^1.15",
         "ext-imap": "*",