* adding reproducible test
* newer version of go-containerregistry
* new ImageOptions
* switch reproducible flag to default to false
* small fixes
* update dep
* Vendor changes for go-containerregistry switch.
* Manual changes for go-containerregistry switch.
The biggest change is refactoring the tarball unpacking.
* Pull more of container-diff out.
* More vendor removals.
* More unit tests.