Update webdriverio to version 4.0.4 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

webdriverio just published its new version 4.0.4, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of webdriverio – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 530 commits (ahead by 530, behind by 122).

• e5e975a v4.0.4
• dfa34d2 Update contributors
• cc00435 updated chrome and firefox versions for ci testing
• 553a52b increased connectionRetryTimeout for sauce ci tests
• 3985e9e more test logging
• 4732baf finised getting started section
• 6781c2d finished whats new section
• 192873c put changelog together - closes #1100
• 24223c1 kicked of doc changes
• 1b9942c Merge pull request #1165 from kevinsawicki/wait-until-this
• 67fcc28 Bind condition with this value
• f6aac22 Add failing spec for waitUntil this value
• 24929f5 Merge pull request #1161 from ipoddubny/fix_windowHandleSize
• a1afbea Fix a bug in windowHandleSize without explicit window handle
• 2a36579 fix logger command call

There are 250 commits in total. See the full diff.

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[divergentdave]

See also #95