Add ability to disable warnings #139
Description
Some of the warnings being produced right now are not very useful for our project, including warnings about not being able to hash various built-in types that won't affect build output anyway:
[Warning] Unsupported target type in the build graph: PACKAGE_GROUP
[Warning] Unable to calculate digest for input //visibility:private for rule //external:maven
It would be nice if we could turn these off to reduce noise in our CI.