Update to middleware 2

Author: WyriHaximus

composer.json

@@ -10,13 +10,13 @@
   ],
   "require": {
     "php": "^7.0",
-    "api-clients/middleware": "^1.0",
+    "api-clients/middleware": "^2.0",
     "api-clients/psr7-oauth1": "^2.0",
     "guzzlehttp/psr7": "^1.3",
     "wyrihaximus/ticking-promise": "^1.6"
   },
   "require-dev": {
-    "api-clients/test-utilities": "^2.0"
+    "api-clients/test-utilities": "^3.0.1"
   },
   "autoload": {
     "psr-4": {