Intention of the `all` variable in `watchpoints/__init__.py`

[bzoracler]

Thanks for this black-magic library!

I'm currently trying to get a set of typing stubs added to typeshed (python/typeshed#13248). One thing that came up was the intention of all:

watchpoints/src/watchpoints/__init__.py

Lines 11 to 14 in 934d7a3

	all = [
	"watch",
	"unwatch"
	]

Was this intended to be __all__, for controlling the symbols imported with from watchpoints import *?

[gaogaotiantian]

Yes, that was a typo. If you want, feel free to make a PR to fix :) Otherwise I can fix it when I get some time.