Separator between "dev" and number not allowed

[pmolodo]

According to the regular expression in Appendix B of the specification for Version Specifiers:

https://packaging.python.org/en/latest/specifications/version-specifiers/#appendix-parsing-version-strings-with-regular-expressionsversion-specifiers/

... a separator character ('-', '_', or '.') is allowed between the word dev and the optional number:

(?P<dev>                     # dev release
    [-_\.]?
    (?P<dev_l>dev)
    [-_\.]?
(?P<dev_n>[0-9]+)?
)?

However, parver will error if one is present:

>>> import parver; parver.Version.parse("0dev.0")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/src/_external/parver/src/parver/_version.py", line 460, in parse
    segments = parse(version, strict=strict)
  File "/src/_external/parver/src/parver/_parse.py", line 242, in parse
    raise ParseError(str(exc)) from None
parver.ParseError: Expected int or '+' or EOF at position (1, 5) => '0dev*.0'.