Fix mysqljs#1371 bigint error

Author: Dinwy

test/common.js

@@ -150,7 +150,7 @@ function mergeTestConfig(config) {
     port     : process.env.MYSQL_PORT,
     user     : process.env.MYSQL_USER,
     password : process.env.MYSQL_PASSWORD
-    }, config);
+  }, config);
 
   return config;
 }