Finagle Oauth2 Versions Save

Release for Finagle 19.2.

A release for Finagle 19.1.

For Finagle 18.12 release

For November's Finagle release.

• Some pieces were refactored: #34
• Autoreleases: #36
• Finagle 18.10: #33

To accommodate Finagle's August release (https://finagle.github.io/blog/2018/08/07/release-notes/).

Release against Finagle 18.4.

A release against Finagle 17.12.0.

For Finagle 6.45.