Allow PHP7.4+

Author: loevgaard

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": ">=7.4",
         "psr/http-client": "^1.0",
         "psr/http-factory": "^1.0",
         "psr/http-message": "^1.0",