build(deps): Bump @percy/agent from 0.16.2 to 0.20.6
build(deps): Bump @percy/agent from 0.16.2 to 0.20.6

Bumps [@percy/agent](https://github.com/percy/percy-agent) from 0.16.2 to 0.20.6.
- [Release notes](https://github.com/percy/percy-agent/releases)
- [Changelog](https://github.com/percy/percy-agent/blob/master/CHANGELOG.md)
- [Commits](https://github.com/percy/percy-agent/compare/v0.16.2...v0.20.6)

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