Bitbucket Cloud: Verify Merge Checks via API 2

[peter_warmenhoven]

Apparently, using API 1.0 it was possible to check if a Pull Request satisfied merge checks by making  GET request to the merge endpoint. The same thing doesn't work in 2.0:

https://api.bitbucket.org/2.0/repositories/<workspace>/<repo>/pullrequests/<pull_request_id>/merge

Unfortunately this does not work any longer and when making a GET request to this endpoint I get a strange error:

`This endpoint does not support token-based authentication`

Though, I am just using Basic Authentication

[Michael Gutierrez]

I found the "canMerge" value in 1.0 very useful because we have multiple repos we sometimes need to merge code to at once. It would save me a lot of code if something was similar in 2.0, but there isn't. I had to resort to checking the PR events for approvals to see if required approves had approved, and checking for merge conflicts manually instead. Messy mess.