webdriver: add prefs to ChromeOptions typings

[klamping]

Proposed changes

Adds typing for ChromeOptions prefs.

This code:

const downloadDir = browser.options.capabilities['goog:chromeOptions'].prefs['download.default_directory'];

throws a TypeScript compilation error:

utils/fileDownloadUtilities.ts:79:80 - error TS2339: Property 'prefs' does not exist on type 'ChromeOptions'.

79         const downloadDir = browser.options.capabilities['goog:chromeOptions'].prefs['download.default_directory'];
                                                                                  ~~~~~

The fix adds the prefs option, which alleviates the TS issue.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

Reviewers: @webdriverio/technical-committee

[codecov]

Codecov Report

Merging #4247 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4247   +/-   ##
=======================================
  Coverage   99.35%   99.35%           
=======================================
  Files         175      175           
  Lines        4323     4323           
  Branches      926      926           
=======================================
  Hits         4295     4295           
  Misses         25       25           
  Partials        3        3

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[christian-bromann]

👍