Multiple versions aren't tagged in git

[kaspergrubbe]

On Rubygems I can see these versions:

2.6.14 - December 13, 2016 (6.04 MB)
2.6.13 - December 09, 2016 (6.04 MB)
2.6.12 - December 09, 2016 (6.04 MB)
2.6.11 - November 01, 2016 (6.04 MB)
2.6.10 - August 19, 2016 (6.04 MB)

But the latest one I can see tagged in Git and on Github is v2.6.4