Bump bower from 1.8.10 to 1.8.11 in /server
Bump bower from 1.8.10 to 1.8.11 in /server

Bumps [bower](https://github.com/bower/bower) from 1.8.10 to 1.8.11.
- [Release notes](https://github.com/bower/bower/releases)
- [Changelog](https://github.com/bower/bower/blob/master/CHANGELOG.md)
- [Commits](https://github.com/bower/bower/commits)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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