Merge pull request #6 from php-api-clients/buzz-support-1.x-and-2.x

Support both 2.x and 1.x of buzz

Author: WyriHaximus

composer.json

@@ -11,7 +11,7 @@
     "php": "^7.0",
     "api-clients/json": "^1.0",
     "api-clients/middleware": "^4.0",
-    "clue/buzz-react": "^1.1",
+    "clue/buzz-react": "^2.0 || ^1.4",
     "psr/http-message": "^1.0",
     "ringcentral/psr7": "^1.2",
     "wyrihaximus/ticking-promise": "^1.6"