update PHP SDK composer version 2.2.3, update dependency versions (#76)

* update PHP SDK composer version 2.2.3, update dependency versions

* move back guzzle changes

Author: ahongbynder

composer.json

@@ -1,7 +1,7 @@
 {
   "name": "bynder/bynder-php-sdk",
   "description": "Bynder PHP Library",
-  "version": "2.2.2",
+  "version": "2.2.3",
   "keywords": [
     "bynder",
     "sdk",
@@ -18,7 +18,7 @@
   "require": {
     "php": ">= 5.6",
     "guzzlehttp/guzzle": "~6.0|~7.0",
-    "league/oauth2-client": "^2.3"
+    "league/oauth2-client": "^2.6"
   },
   "require-dev": {
     "phpunit/phpunit": "^5",