Merge pull request #39 from chadicus/dev/signatures

Make parameters optional to match concrete client

Author: chadicus

.travis.yml

@@ -1,4 +1,5 @@
 language: php
+dist: trusty
 php:
   - 7.0
   - 5.6

src/ClientInterface.php

@@ -37,12 +37,12 @@ function index($resource, array $filters = []);
      *
      * @return mixed opaque handle to be given to endGet()
      */
-    function startGet($resource, $id, array $parameters);
+    function startGet($resource, $id, array $parameters = []);
 
     /**
      * @see startGet()
      */
-    function get($resource, $id, array $parameters);
+    function get($resource, $id, array $parameters = []);
 
     /**
      * Create a new instance of an API resource using the provided $data