chore(pyproject): Fix click version constraint

^7 is equivalent to >=7<8

See also: https://python-poetry.org/docs/versions/#caret-requirements

This doesn't affect normal releases since we still use setup.py pending #625

Author: tony

pyproject.toml

@@ -38,7 +38,7 @@ tmuxp = 'tmuxp:cli.cli'
 
 [tool.poetry.dependencies]
 python = "~2.7 || ^3.5"
-click = ">=7<8"
+click = "^7"
 kaptan = ">=0.5.10"
 libtmux = "<0.9"
 colorama = ">=0.3.9"