Backport fix potential segfault in kRing due to invalid digit (uber#498…

…) (uber#500)

* Backport fix potential segfault in kRing due to invalid digit (uber#498)

* Backport CI config

Merge pull request uber#400 from isaacbrodsky/bump-3.7.1

Update for 3.7.1

Prepare for release v3.7.0 (uber#395)

* update changelog and fix @defgroup for exactEdgeLength

* update docs

* Changelog: Change CHANGELOG to match style of previous CHANGELOG changes

* get reeeealy specific in the release steps

Merge pull request uber#358 from isaacbrodsky/bump-3.6.4

Prepare for release v3.6.4

Merge pull request uber#307 from nrabinowitz/release-3.6.3

Preparing for release 3.6.3

Merge pull request uber#294 from nrabinowitz/release-3.6.2

Preparing for release 3.6.2

Merge pull request uber#288 from nrabinowitz/release-3.6.1

Release 3.6.1

Merge pull request uber#273 from isaacbrodsky/version-3.5.1

Version 3.6.0

Merge pull request uber#260 from nrabinowitz/release-3.5.0

Preparing for release 3.5.0

Merge pull request uber#244 from isaacbrodsky/version-3.4.4

Version 3.4.4