chore(deps): update devdependency nightwatch to ^1.7.12

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
nightwatch (source)	^1.7.8 -> ^1.7.12

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Release Notes

nightwatchjs/nightwatch

### [`v1.7.12`](https://togithub.com/nightwatchjs/nightwatch/compare/v1.7.11...v1.7.12) [Compare Source](https://togithub.com/nightwatchjs/nightwatch/compare/v1.7.11...v1.7.12) ### [`v1.7.11`](https://togithub.com/nightwatchjs/nightwatch/releases/v1.7.11) [Compare Source](https://togithub.com/nightwatchjs/nightwatch/compare/v1.7.10...v1.7.11) - This version is only updating the `proxy-agent` dependency package to the latest version. ### [`v1.7.10`](https://togithub.com/nightwatchjs/nightwatch/releases/v1.7.10) [Compare Source](https://togithub.com/nightwatchjs/nightwatch/compare/v1.7.9...v1.7.10) - **Fixed** [#​2899](https://togithub.com/nightwatchjs/nightwatch/issues/2899) – an issue with setValue/sendKeys commands - **Added** new `updateValue` command ### [`v1.7.9`](https://togithub.com/nightwatchjs/nightwatch/releases/v1.7.9) [Compare Source](https://togithub.com/nightwatchjs/nightwatch/compare/v1.7.8...v1.7.9) - **Fixed** an issue where `selenium_host` config property wasn't set ([#​2892](https://togithub.com/nightwatchjs/nightwatch/issues/2892) ) - **Added** support to set `browserName` to `null` in order to accommodate Appium ([#​2882](https://togithub.com/nightwatchjs/nightwatch/issues/2882))

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