Updated Buzz and jacobkiers/oauth to latest versions
Updated Buzz and jacobkiers/oauth to latest versions

Changed version of jacobkiers/oauth from ~1.0.10 to ~1.0 in order to allow
any minor version.

Current state:

- kriswallsmith/buzz to 0.15 from 0.13
- jacobkiers/oauth to 1.0.12 from 1.0.10

gentlero/bitbucket-api