Add support for triggering an Assignment Rule

It doesn't appear to be documented anywhere, but I learned from Zoho
support that if you pass a `larid` param with the ID of a Zoho
Assignment Rule as a parameter, that assignment rule will be kicked off
in Zoho when you insert records via the API. I've only tested this out
with inserting Leads. Mileage may vary in other types of cases.

Request/InsertRecords.php

@@ -51,6 +51,16 @@ public function triggerWorkflow()
         return $this;
     }
 
+    /**
+     * @param int $ruleId
+     * @return InsertRecords
+     */
+    public function triggerAssignmentRule($ruleId)
+    {
+        $this->request->setParam('larid', $ruleId);
+        return $this;
+    }
+
     /**
      * @return InsertRecords
      */

Tests/Request/InsertRecordsTest.php

@@ -39,6 +39,13 @@ public function testTriggerWorkflow()
         $this->assertEquals('true', $this->request->getParam('wfTrigger'));
     }
 
+    public function testTriggerAssignmentRule()
+    {
+        $ruleId = 99001321231213;
+        $this->insertRecords->triggerAssignmentRule($ruleId);
+        $this->assertEquals($ruleId, $this->request->getParam('larid'));
+    }
+
     public function testOnDuplicate()
     {
         $this->insertRecords->onDuplicateUpdate();
@@ -64,4 +71,3 @@ protected function setUp()
         $this->insertRecords = new Request\InsertRecords($this->request);
     }
 }
-