Support #ref as npm does

[dankegel]

Some systems, e.g. npm, support specifying a commit or branch by adding #commit at the end of the url; see
https://docs.npmjs.com/files/package.json#git-urls-as-dependencies

After this feature is implemented, one would expect

git clone https://github.com/retr0h/git-url-parse
cd git-url-parse
pip3 install --user -e .
python3 -c 'import giturlparse; print(giturlparse.parse("git@gitlab.com:hi/there#rel-1.1"))'

to output e.g.

Parsed(pathname='hi/there', protocols=[], protocol='ssh', href='git@gitlab.com:hi/there#rel-1.1', resource='gitlab.com', user='git', port=None, name='there', owner='hi', ref='rel-1.1')

or possibly

Parsed(pathname='hi/there', protocols=[], protocol='ssh', href='git@gitlab.com:hi/there', resource='gitlab.com', user='git', port=None, name='there', owner='hi', ref='rel-1.1')

(because arguably href should be what one passes to 'git clone')

[dankegel]

See https://github.com/retr0h/git-url-parse/pull/17