Change minimum PHP version to 7.1.0

Author: silasrm

composer.json

@@ -20,7 +20,7 @@
         }
     ],
     "require": {
-        "php": "^7.2.0",
+        "php": "^7.1.0",
         "mikechip/chatapi": "2.0.*",
         "illuminate/notifications": "^5.6|^6.0|^7.0|^8.0",
         "illuminate/queue": "^5.6|^6.0|^7.0|^8.0",