Bump mini_racer from 0.2.8 to 0.2.9 (#2157)
Bump mini_racer from 0.2.8 to 0.2.9 (#2157)

Bumps [mini_racer](https://github.com/discourse/mini_racer) from 0.2.8 to 0.2.9.
- [Release notes](https://github.com/discourse/mini_racer/releases)
- [Changelog](https://github.com/rubyjs/mini_racer/blob/master/CHANGELOG)
- [Commits](https://github.com/discourse/mini_racer/compare/v0.2.8...v0.2.9)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
tablexi/nucore-open,tablexi/nucore-open,tablexi/nucore-open,tablexi/nucore-open