WFU-4311: Add unsetCookies method
Merge branch 'master' into guiohm/WFU-4311/prevent_duplicate_tracking_sessions
WFU-4311: Bump Airbrake
Merge pull request #9 from Work4Labs/guiohm/WFU-4311/prevent_duplicate_tracking_sessions

WFU-4311: Add unsetCookies method