pre-release 7.0.0

This is a pre-release of the upcoming 7.0.0 release and is intended for early access and validation for those wanting to try out the new release directly from GitHub prior to finalized release being published to rubygems.org.

pre-release 6.15.0

Update version and changelog for 6.15.0 (#540)

* update changelog

* bump version

* removed extra line

* added changelog entries

* updated changelog

6.13.1-pre

Pre-release for 6.13.1

6.13.0 Prerelease

Prerelease version of 6.13.0 used for internal testing.