fix test cases

0.3.11

bump to 0.3.11

bugfix release

change severity to warning in case an ARG or ENV variable is undefined

because the base image can set those variables and we cannot check what's
set in the base image without pulling it
this way !pedantic will say that the Dockerfile is ok and the admin can
have a look to make sure

fixes #49

bugfix release

v0.3.9

bump to 0.3.9

bugfix release

v0.3.8

bump to 0.3.8

bugfix release

v0.3.7

bump version

bugfix release

v0.3.6

bump to 0.3.6

fix previous release

v0.3.5

bump to 0.3.5

bugfix release

v0.3.2

bump to 0.3.2

bugfix release

v0.3.1

bump to 0.3.1

v0.3.0

This release changes how warnings and errors are handled. Warnings are allowed and the Dockerfile
will not fail, unless running in pedantic mode.