Log Message:
geckodriver: update to 0.23.0

v0.23.0

Removed:
- The POST /session/{session id}/element/{element id}/tap endpoint
  was removed, thanks to Kerem Kat.
Changed:
- webdriver crate upgraded to 0.38.0.
Fixed:
- desiredCapabilities and requiredCapabilities are again
    recognised on session creation
- duration field made optional on pause actions
- Log level formatted to expected Marionette input
- temporary field on addon installation made optional
- SHA1s in version information uses limited number of characters