Lack of dependency 'dns'

[naokikurosawa]

webpack sais:

ERROR in ./~/isemail/lib/index.js
Module not found: Error: Cannot resolve module 'dns' in /Users/kurosawa/Documents/launcherbot/lb_service/node_modules/isemail/lib
 @ ./~/isemail/lib/index.js 5:12-26

package.json doesn't describe dependency about this.

[skeggse]

it's a node built-in