The existing github wrapper is now extended to cache any get request. The existing pr cache is removed as it is now redundant.

Helps #954

Closes #1164 

Use `cacache` to persist changelog results between runs.

This PR refactors the npm registry code to use `make-fetch-happen` instead of got. Additionally, it will use `cacache` for a disk-based caching solution.

Closes #1075

- use cross-env for jest
- escape `prettier` script
- remove snapshots that include `path.join()`

Closes #1148 

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 

Previously, packages within a workspace or lerna project were ignores across the entire repo. Now, they are only ignored within package files that exist in the same lerna project or yarn workspace.

Closes #1147

Pull Request and PR are already search/replaced in JS code for GitLab.