commit 2d124e0ce9 added some integration-tests,
and as part of those tests added github.com/distribution/distribution/v3 as a
direct dependency.
github.com/distribution/distribution/v3 is unreleased, and is still receiving
backward breaking changes. While this dependency is already used elsewhere,
it looks like the only use in buildx was for a sanity check of the custom
TEST_BUILDKIT_IMAGE; we can probably relax that check to avoid adding the
direct dependency.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Sebastiaan van Stijn