Feature Request: Milliseconds Support

[USSX-Hares]

Hi there
It would be nice to add milliseconds support to this tool

I was able to do that at runtime by overriding some internal values with the following code part:

import re
from pytimeparse import timeparse
timeparse.MILLIS = r'(?P<millis>[\d.]+)\s*(?:ms|msecs?|millis|milliseconds?)'
timeparse.TIMEFORMATS[0] += r'\s*' + timeparse.OPT(timeparse.MILLIS)
timeparse.MULTIPLIERS['millis'] = 1e-3
timeparse.COMPILED_TIMEFORMATS[0] = re.compile(r'\s*' + timeparse.TIMEFORMATS[0] + r'\s*$', re.I)

[onegreyonewhite]

@USSX-Hares thanx for idea. It was added to pytimeparse2==1.3.0

[2br-2b]

Just a note, I think this may be a duplicate of #17