clone-bundles: add an option to generate bundles in the background
This is what the "on-change" version have been doing from the start, it seems
useful to also offer this option in the command.
[build-system]
requires = ["setuptools", "wheel"]
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true