feat: expose dubFlags; version 0.4.1

Fixes #24

feat: support gitlab repos (#25)

Fixes #23

chore: upgrade vibe.d; bump version to 0.3.1

chore: bump version to 0.3.0

fix: remove git+ before calling nix-prefetch-git

fix: bump version

Fix CI

Fix test fixture

Fix: remove incompatible attrs from mkDerivation

fixes #7

Better skeleton file + doc