Remove version from composer.json and allow all PHP version above 7.4.

Author: ianef

composer.json

@@ -1,7 +1,6 @@
 {
     "name": "xactsystems/command-scheduler",
     "description": "A Symfony command scheduler.",
-    "version": "4.5.2",
     "type": "symfony-bundle",
     "license": "MIT",
     "authors": [
@@ -22,7 +21,7 @@
     },
     "minimum-stability": "stable",
     "require": {
-        "php": "^7.4",
+        "php": ">=7.4.12",
         "doctrine/doctrine-bundle": "^2.1",
         "doctrine/orm": "^2.10",
         "symfony/asset": "^4.4||^5.4",