chore(deps-dev): bump prettier from 1.15.1 to 1.15.3

Bumps [prettier](https://github.com/prettier/prettier) from 1.15.1 to 1.15.3.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/prettier@1.15.1...1.15.3)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support