build(deps): libtmux 0.15.10 -> 0.16.0a0 (environment variables)

Passthrough of environmental variables via -e in tmux 3.0 and above.

See also: tmux-python/libtmux#453

Author: tony

poetry.lock

@@ -47,7 +47,7 @@ tmuxp = 'tmuxp:cli.cli'
 
 [tool.poetry.dependencies]
 python = "^3.7"
-libtmux = "~0.15.10"
+libtmux = "~0.16.0a0"
 colorama = ">=0.3.9"
 PyYAML = "^6.0"