FIX Composer detected issues in your platform:

 Your Composer dependencies require a PHP version ">= 7.3.0"

Already installed the correct php version:

Then you can fix using:

1. TIPS

   Add this lines in composer.json file:

   {
       "config": {
   
           "platform-check": false
       }
   }
   

   Or set the version:

   {
       "config": {
   
           "platform": {
               "php": "7.1.0"
           }
       }
   }
   

2. run php artisan config:cache

3. then run composer dump-autoload in terminal

    4. rm -rf vendor

   5. composer install