igwn-auth-utils 0.2.0

Backwards-compatible feature release

Changes:

- [duncanmmacleod/igwn-auth-utils#5] add new `igwn_auth_utils.requests` interface
- [duncanmmacleod/igwn-auth-utils#8] update to scitokens >=1.5.0
- [duncanmmacleod/igwn-auth-utils#9] add support for discovering X.509 credentials in `~/.globus`
- [duncanmmacleod/igwn-auth-utils#10] improvements to X.509 handling
- [duncanmmacleod/igwn-auth-utils#11] prefer `X509_USER_CERT/KEY` over X509_USER_PROXY
- [duncanmmacleod/igwn-auth-utils#12] add new `igwn_auth_utils.IgwnAuthError` exception object

The full list of changes related to this release can be seen at

<https://github.com/duncanmmacleod/igwn-auth-utils/pulls?q=is:pr+milestone:0.2.0>

0.1.0: first release

This is the first release of this project