fix: remove higher platform

Author: justlevine

source/composer.json

@@ -16,9 +16,6 @@
 		"wpackagist-plugin/wp-graphql": "2.3.3"
 	},
 	"config": {
-		"platform": {
-			"php": "7.4"
-		},
 		"allow-plugins": {
 			"composer/installers": true
 		}