Removed errant commas, that cause parse errors in earlier PHP versions

Author: Tim Green

tests/Filters/EnumFilterTest.php

@@ -43,7 +43,7 @@ public function can_search_if_passed_a_valid_term()
 
         $this->assertEquals(
             'select * from "pets" where "letter" = ?',
-            $query->toSql(),
+            $query->toSql()
         );
     }
 }