Merge pull request tweag#151 from tweag/release-0.8.0

Release 0.8.0

refactoring: simplify nix-file-deps code a tad

Merge pull request tweag#98 from tweag/release-0.6.0

Release 0.6.0

Releasing rules_nixpkgs 0.5.2

Merge pull request tweag#57 from tweag/release_0_5_1

New release

Changelog entries.

Buildify source code.

Merge pull request tweag#37 from tweag/fix-mandatory-repositories

Fix repositories argument being required (bump 0.3.1)

Release notes for v0.3.

Add a changelog.