build(deps-dev): Bump webdriverio from 5.16.10 to 5.18.7
build(deps-dev): Bump webdriverio from 5.16.10 to 5.18.7

Bumps [webdriverio](https://github.com/webdriverio/webdriverio) from 5.16.10 to 5.18.7.
- [Release notes](https://github.com/webdriverio/webdriverio/releases)
- [Changelog](https://github.com/webdriverio/webdriverio/blob/v5.18.7/CHANGELOG.md)
- [Commits](https://github.com/webdriverio/webdriverio/compare/v5.16.10...v5.18.7)

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