chore(deps): update webdriverio monorepo to v6.6.7

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@wdio/cli	devDependencies	patch	6.6.6 -> 6.6.7
@wdio/local-runner	devDependencies	patch	6.6.6 -> 6.6.7

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Release Notes

webdriverio/webdriverio

### [`v6.6.7`](https://togithub.com/webdriverio/webdriverio/blob/master/CHANGELOG.md#v667-2020-10-20) [Compare Source](https://togithub.com/webdriverio/webdriverio/compare/v6.6.6...v6.6.7) ##### :rocket: New Feature - `wdio-sync`, `webdriverio` - [#​6006](https://togithub.com/webdriverio/webdriverio/pull/6006) webdriverio: mock respond in request stage ([@​mgrybyk](https://togithub.com/mgrybyk)) ##### :bug: Bug Fix - `wdio-browserstack-service` - [#​6000](https://togithub.com/webdriverio/webdriverio/pull/6000) Add proper multi-remote session support for Browserstack service ([@​hieuxlu](https://togithub.com/hieuxlu)) - `wdio-mocha-framework`, `wdio-sauce-service` - [#​5997](https://togithub.com/webdriverio/webdriverio/pull/5997) Properly report Sauce job for Mocha retries ([@​christian-bromann](https://togithub.com/christian-bromann)) ##### Committers: 4 - Christian Bromann ([@​christian-bromann](https://togithub.com/christian-bromann)) - Hieu Do ([@​hieuxlu](https://togithub.com/hieuxlu)) - Mykola Grybyk ([@​mgrybyk](https://togithub.com/mgrybyk)) - [@​dependabot-preview\[bot\]](https://togithub.com/apps/dependabot-preview)

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