Co-authored-by: Jamie Magee <jamie.magee@gmail.com>

Co-authored-by: Rhys Arkins <rhys@arkins.net>

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

* chore(deps): update dependency prettier to v2

* Run prettier-fix

Co-authored-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: Jamie Magee <jamie.magee@gmail.com>

Use defined error constants throughout codebase.

This reverts commit b5c9dc8e.

With Renovate’s github platform code now using git for all file system operations, we need to tell Renovate which gitAuthor to use.

If you had already configured a gitAuthor in your bot config, you do not need to make any change.

Otherwise, to keep functionality as before, you should either:
(1) configure `gitAuthor` to match the bot’s account, or
(2) recreate your bot’s personal access token to include the “user:email” permission so that the bot can retrieve the email itself

BREAKING CHANGE: GitHub bot admins should either configure gitAuthor in their config or generate a new token with “user:email” permissions.

Rename all VSTS references to be Azure DevOps.

Closes #2810

BREAKING CHANGE: 'vsts' platform is now renamed to 'azure'

Adds platform support for Bitbucket cloud.

Closes #136, Closes #2238

This PR adds support for Microsoft's [Visual Studio Team Services](https://www.visualstudio.com/team-services/) platform (in addition to existing GitHub and GitLab support). 

Closes #571 

Refactors file system of platforms and adds test to ensure GitHub and GitLab have same module.exports signatures.