bundle: introduce a "v3" spec
This is a small update from "v2", we use the freshly out of experimental
changelog version "03' format (alignment with bundle version is a coincidence) and we
now bundle phases by default.
We shall use v3 as the default bundle type later, when changegroup version '03'
is a bit more established
[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