Drop everything older than PHP 7.4

Author: dktapps

composer.json

@@ -4,7 +4,7 @@
 	"type": "library",
 	"license": "LGPL-3.0",
 	"require": {
-		"php": "^7.2 || ^8.0",
+		"php": "^7.4 || ^8.0",
 		"php-64bit": "*"
 	},
 	"require-dev": {