Whitelist bugsnag

[bcherny]

[0xBRM]

https://github.com/gorhill/uBlock/blob/master/CONTRIBUTING.md

[bcherny]

@CrisBRM what's the process for submitting proposed filter changes? to me, blocking bugsnag is a bug.

[0x647262]

https://github.com/gorhill/uBlock/blob/master/CONTRIBUTING.md

5. Verify that the issue is not related to a 3rd-party filter lists.

@CrisBRM find the 3rd party list it's related to, then email the maintainer of said list.