fix to associatons

Author: mibewh

src/Node.php

@@ -46,7 +46,7 @@ public function associate($other_node, $association, $association_directionality
         try
         {
             $params = array("node" => $other_node);
-            $res = $this->client->post($uri, $params, array("_type" => $association));
+            $res = $this->client->post($uri, $params, $association);
             $association_node = new Node($this, $res);
         }
         catch (\GuzzleHttp\Exception\ClientException $ex)

tests/NodeTest.php

@@ -108,6 +108,7 @@ public function testNodeAssociation()
 
         $associationNode = $node1->associate($node2, "a:linked", true);
 
+        $this->assertNotNull($associationNode->id);
         $this->assertTrue($associationNode instanceof Node);
 
         $node1->delete();