1.20.0

Changelog

6a58bd9 Adjust whitespace only
cadffd8 Install jwt-cli
35a657a Install terragrunt
93792d3 Removed kernel upgrade for sshuttle workaround
38e3672 Updated customizing section of readme
392949a Upgrade Git to latest
7383923 Upgrade docker image to Ubuntu 20.04 focal
21df02a Upgrade virtualbox vagrant image to ubuntu 20.04