Bearer Token Auth type support

[wingyplus]

I want to propose a Bearer Token auth type to Auth menu. Like Postman does:

Currently, I work around this by manually setting the Authorization header in the' Headers' menu. Having this support would shorten the typing flow a little.

[edgarrmondragon]

I've started a PR: #152

[darrenburns]

Added in 2.5.0, out now!

Thanks @edgarrmondragon for implementing this :)