Updated dependencies to all tagged version

Author: WyriHaximus

composer.json

@@ -2,8 +2,6 @@
   "name": "api-clients/pusher",
   "homepage": "https://php-api-clients.org/clients/pusher",
   "license": "MIT",
-  "minimum-stability": "dev",
-  "prefer-stable": true,
   "authors": [
     {
       "name": "Cees-Jan Kiewiet",
@@ -12,13 +10,13 @@
   ],
   "require": {
     "php": "^7.0",
-    "api-clients/command-bus": "dev-master",
+    "api-clients/command-bus": "^2.0",
     "clue/block-react": "^1.1",
     "ocramius/package-versions": "^1.1",
     "rx/websocket": "^0.9.2"
   },
   "require-dev": {
-    "api-clients/test-utilities": "dev-master"
+    "api-clients/test-utilities": "^2.0"
   },
   "autoload": {
     "psr-4": {