React to window resize event

[jackfranklin]

If I have a buffertag displaying for window X, but then resize the window, the buffertag's position isn't redrawn and ends up looking a little off:

Before resize, in correct position:

After resize:

I think we can listen to a resize event/autocmd and re-draw the buffertag. Would you be open to a PR that does that?

[ldelossa]

Hey there!

I did try this! And for some reason i didnt get it to work. If you submit a PR for this id definitely accept

[ldelossa]

P.s - i dig your nice white theme. White themes are underrated!

[trmckay]

~Until something like https://github.com/neovim/neovim/issues/11532, I don't know if it's possible to fix this.~

jk -- https://github.com/ldelossa/buffertag/pull/10