build(deps): bump pynvim from 0.4.3 to 0.5.0

Bumps [pynvim](https://github.com/neovim/pynvim) from 0.4.3 to 0.5.0.
- [Release notes](https://github.com/neovim/pynvim/releases)
- [Commits](neovim/pynvim@0.4.3...0.5.0)

---
updated-dependencies:
- dependency-name: pynvim
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -1,3 +1,3 @@
-pynvim==0.4.3
+pynvim==0.5.0
 requests==2.32.3
 simple-websocket-server==0.4.2