v0.5.0

This is the initial release of the github.com/distribution/reference module.

This module was extracted from the github.com/distribution/distribution/reference package at commit distribution/distribution@b9b1940;

Git history has been preserved, using the following;

git rev-parse --verify HEAD
b9b19409cf458dcb9e1253ff44ba75bd0620faa6

# remove all code, except for general files, 'reference/', and rename to /
git filter-repo \
  --path .github/workflows/codeql-analysis.yml \
  --path .github/workflows/fossa.yml \
  --path .golangci.yml \
  --path distribution-logo.svg \
  --path CODE-OF-CONDUCT.md \
  --path CONTRIBUTING.md \
  --path GOVERNANCE.md \
  --path README.md \
  --path LICENSE \
  --path MAINTAINERS \
  --path-glob 'reference/*.*' \
  --path-rename reference/: