`git pw series` needs `update` feature

[andy-shev]

Update series is usually what would be nice to have.

[stephenfin]

Currently the only thing that can be updated is series names, which simply aren't exposed. What would be more useful is updating series state but that's blocked on the server side by getpatchwork/patchwork#157. One that's resolved, we should definitely do this.

[borkmann]

Would love to have that feature, so I could set the entire series simply to accepted. Any progress on this? Thx

[stephenfin]

It should be in 3.0, though that's a good six months to a year out, unfortunately. At present, we're stuck with a DB issue that no one has yet figured out (though someone is working on it)