Update selenium to 3.4.2

[pyup-bot]

There's a new version of selenium available.
You are currently using 3.3.3. I have updated it to 3.4.2

These links might come in handy: PyPI | Changelog | Repo

Changelog

3.4.2

• translate move_by_offset command to w3c
• Update capabilities properly instead of assuming dict structure. Fixes 3927
• Add missing file for Chrome options to API docs.
• Add Chrome options module to API docs.

3.4.1

• Add back the ability to set profile when using Firefox 45ESR. Fixes 3897

3.4.0

• Correct usage of newSession around firstMatch and alwaysMatch
• Remove superfluous capabilities that are not needed
• Add expected condition that waits for all found elements to be visible (3532)
• Allow methods wrapped by EventFiringWebDriver and EventFiringWebElement (806)
• Dropping javascriptEnabled capability for real browsers
• Use W3C check from parent object instead of assuming from capabilities
• Bump example source distribution to match latest release.
• Replace TypeError with KeyError in remote webdriver error handler code (3826)
• When testing Marionette use default capabilities in testing
• Conform to the api of urllib2 for adding header for a request (3803)
• Add text key to alertsendKeys parameters for W3C Endpoint
• Location once scrolled into view should use W3C executeScript endpoint not JSONWP
• Fixed the usage information in documentation of "save_screenshot". (3804)
• Add Element Not Interactable exception
• Clean up imports in error handler
• flake8 cleanup

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖