Bumps [raven-js](https://github.com/getsentry/raven-js) from 3.27.1 to 3.27.2.
- [Release notes](https://github.com/getsentry/raven-js/releases)
- [Changelog](https://github.com/getsentry/sentry-javascript/blob/master/CHANGELOG.md)
- [Commits](https://github.com/getsentry/raven-js/compare/v3.27.1...v3.27.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>