contrib: add a script to build all of the wheels on macOS
This is mostly a translation of `contrib/packaging/build-windows-wheels.bat`,
except the default pythons to build can be inferred from `setup.py` and/or
`pyproject.toml`, and all use the same configuration. All we need to do is
force the building of translation files, tell it to skip pypy wheels, and tell
it to build universal2 wheels instead of for the current architecture.
default = 'shortlog'
shortlog = "'raw' is not a browsable style"
changelog = changelog.tmpl
changelogentry = logentry.tmpl
search = search.tmpl
mimetype = 'text/plain; charset={encoding}'
header = ''
footer = ''
changeset = changeset.tmpl
difflineplus = '{line}'
difflineminus = '{line}'
difflineat = '{line}'
diffline = '{line}'
changesetparent = '# Parent {node}'
changesetchild = '# Child {node}'
filenodelink = ''
filenolink = ''
fileline = '{line}'
diffblock = '{lines}'
filediff = filediff.tmpl
fileannotate = fileannotate.tmpl
annotateline = '{author|user}@{rev}: {line}'
manifest = manifest.tmpl
direntry = 'drwxr-xr-x {basename}\n'
fileentry = '{permissions|permissions} {size} {basename}\n'
index = index.tmpl
notfound = notfound.tmpl
error = error.tmpl
indexentry = '{url}\n'
tags = '{entries%tagentry}'
tagentry = '{tag} {node}\n'
bookmarks = '{entries%bookmarkentry}'
bookmarkentry = '{bookmark} {node}\n'
branches = '{entries%branchentry}'
branchentry = '{branch} {node} {status}\n'
graph = graph.tmpl
graphnode = graphnode.tmpl
graphedge = graphedge.tmpl
bookmarkname = 'bookmark: {name}\n'
branchname = 'branch: {name}\n'
tagname = 'tag: {name}\n'