notcurses: upgrade to 2.1.8
New upstream release of crate, matching the version (2.1.7) in the archive.
Added explicit libncurses-dev
dep to debcargo.toml
to resolve linking problem. It's possible that I need add this to the main libnotcurses-dev
package; I'm looking into it. If I do so for 2.1.8+, I'll remove the dep here.
Edited by nick black