Update composer.json

PHP version dependency bump to minimum of 7.3

Author: darryldecode

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=7.1",
+        "php": ">=7.3",
         "illuminate/support": "5.0.*|5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0",
         "illuminate/validation": "5.0.*|5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0",
         "illuminate/translation": "5.0.*|5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0"