Release 4.21.0
- Changed: Updated default version of runner to 13.7
- Changed: Updated default version of docker machine to GitLab v0.16.2-gitlab.2
- Changed: Updated default runner ami to ubuntu 20.04
- Added: Option to set docker runtime (#273) by @thomaskelm
- Added: Option to attach additional policies to the runner (#269) by @bliles
- Added: Random suffix to s3 bucket (#252) by @fliphess