Add min_version for Android and iOS platforms in nativephp.json

Sets android min_version to "21" (Android 5.0) and ios min_version to
"13.0" to satisfy NativePHP marketplace submission review checks.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: codingwithrk

nativephp.json

@@ -39,6 +39,7 @@
     }
   ],
   "android": {
+    "min_version": "21",
     "permissions": [],
     "repositories": [],
     "dependencies": {
@@ -50,6 +51,7 @@
     "providers": []
   },
   "ios": {
+    "min_version": "13.0",
     "permissions": [],
     "repositories": [],
     "dependencies": {