We adapt to some changes in the SimpleCov public API.

We also exclude the `spec` subdirectory from line coverage
calculations in order to avoid spurious coverage fluctuations.

https://nvd.nist.gov/vuln/detail/CVE-2020-8130

* adds list repo invitations

* namespaced invitations

* adds delete invitations endpoint

* fixture and list spec initial work

* adding delete invitations spec

* fixing broken spec and updating syntax

The Github Licenses API uses the open source Ruby Gem Licensee to
attempt to identify the project's license. Licensee matches the contents
of a project's LICENSE file (if it exists) against a short list of known
licenses. As a result, the API does not take into account the licenses
of project dependencies or other means of documenting a project's license
such as references to the license name in the documentation.

If a license is matched, the license key and name returned conforms to
the SPDX specification.

Signed-off-by: zachwick <[email protected]>

* Add 'has_projects' to the list of valid repo options

Quotting https://developer.github.com/v3/repos/#edit

```
has_projects  boolean  Either true to enable projects for this
                       repository or false to disable them. Default:
                       true. Note: If you're creating a repository in an
                       organization that has disabled repository
                       projects, the default is false, and if you pass
                       true, the API returns an error.
```

* Fix Travis-CI build when bundler 2.0 is installed

See the following link for additional details:
https://docs.travis-ci.com/user/languages/ruby/#bundler-20

…bmock dependency