Updated to stable future to promise converter

Author: WyriHaximus

composer.json

@@ -12,7 +12,7 @@
     "require": {
         "php": "^7.4",
         "ext-parallel": "*",
-        "react-parallel/future-to-promise-converter": "dev-master",
+        "react-parallel/future-to-promise-converter": "^1.0",
         "react/event-loop": "^1.1",
         "react/promise": "^2.7",
         "wyrihaximus/constants": "^1.4.3"