As a means to reduce the privileges provided to the job executing, we
can document what the minimal `permissions` required for the Actions'
`GITHUB_TOKEN` is.
- Document the release process in `CONTRIBUTING.md`
- Add development instructions to `CONTRIBUTING.md` (adapted from [download-artifact](https://github.com/actions/download-artifact))
- Add a test badge to the `README`
- Link to `CONTRIBUTING.md` in `README`
- Unify copy between `README.md` and `action.yml`
- Copy-pasta the CoC from [download-artifact](https://github.com/actions/download-artifact)
* Add support for exclusions
Paths can be negated to stop searching through the remaining patterns in
a the glob list. All changed files tested and at least one matching file
will result in a label being added.
Fixesactions/labeler#9
* Add support for "AND"-ed matches
A new "rich" matcher object can be provided instead of a normal glob.
The matcher object has two fields that accept an array of globs:
* Globs in "all" must all match every changed file.
* Globs in "some" must all match at least one changed file.
Combined with negated globs, this allows for a precise control of when
labels are applied.
* Rename `some` to `any`
* Update README
