Update webfinger.js requirement from 2.6.6 to 2.7.0 (#3414)
Update webfinger.js requirement from 2.6.6 to 2.7.0 (#3414)

Updates the requirements on [webfinger.js](https://github.com/silverbucket/webfinger.js) to permit the latest version.
- [Release notes](https://github.com/silverbucket/webfinger.js/releases)
- [Changelog](https://github.com/silverbucket/webfinger.js/blob/master/RELEASE_CHECKLIST)
- [Commits](https://github.com/silverbucket/webfinger.js/commits/v2.7.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
syuilo/Misskey,syuilo/Misskey