Merge pull request #1 from fudanchii/fudanchii/rails-6

[Review Only] Make it compatible with rails 6

tmp

Bump version for 0.13.0.beta2

Bump to 0.13.0-beta1

Release 0.12.0

Release 0.11.2.

Noteable: plucky upgrade and rails 3.2 support

Release 0.11.1

Release 0.11.0

Release 0.10.1

Prepare for 0.10 release