do not share the cache

add correct Dockerfile for testing

support label filtering

remove default depth

add changelog for v21

CHANGELOG notes for v20

Merge pull request jtarchie#47 from arwineap/master

Added basebranch git config parameter

concourse pipeline

Merge pull request jtarchie#35 from jmcarp/conditional-deprecation

Skip deprecation warning when version set to every.

release notes v16