py(deps) libtmux: 0.39.0 -> 0.40.0

See also:
- https://github.com/tmux-python/libtmux/releases/tag/v0.40.0
- https://github.com/tmux-python/libtmux/blob/v0.40.0/CHANGES

Author: tony

pyproject.toml

@@ -39,7 +39,7 @@ include = [
   { path = "conftest.py", format = "sdist" },
 ]
 dependencies = [
-  "libtmux~=0.39.0",
+  "libtmux~=0.40.0",
   "colorama>=0.3.9",
   "PyYAML>=6.0"
 ]