[0.4.0] why not keep connect! same as 0.3.x, change the docs and make a new func?

[touchft]

how about make a new function and keep connect! as 0.3.x?
[0.3.x] connect!(x,y) means x->y
[0.4.x] plugin!(x,y)/update!(x,y)/transfer!(x,y) means y->x

[timholy]

1. Because the old function did the opposite of what it said in the in documentation.
2. The Julia convention is that the modified argument is first. This case is actually ambiguous because while in connect!(x, y), x will be lazily-modified whenever y is, the way Observables is implemented means the actual change in connectivity is made to y. So this argument isn't as definitive as it could be.
3. If people had wanted to preserve the old behavior, they should have submitted a PR to fix the docstring. No one did over years of use.
4. We don't need 2 functions that do the same thing

[touchft]

Thank you!