Take advantage of the new ParsedContentsInterface

Author: WyriHaximus

composer.json

@@ -11,12 +11,12 @@
   "require": {
     "php": "^7.0",
     "api-clients/hydrator": "^1.0",
-    "api-clients/middleware-json": "^3.0 || ^2.0 || ^1.0",
     "api-clients/rx": "^2.1",
-    "api-clients/transport": "^3.0 || ^2.0 || ^1.0",
+    "api-clients/transport": "^3.1",
     "igorw/get-in": "^1.0"
   },
   "require-dev": {
+    "api-clients/middleware-json": "^3.1",
     "api-clients/test-utilities": "^3.0.1"
   },
   "autoload": {