Forward compatibility with upcoming Socket v1.0 and v0.8

Author: clue

composer.json

@@ -18,7 +18,7 @@
     },
     "require": {
         "php": ">=5.3",
-        "react/socket": "^0.7.1",
+        "react/socket": "^1.0 || ^0.8 || ^0.7.1",
         "react/promise": " ^2.1 || ^1.2.1",
         "ringcentral/psr7": "^1.2"
     },