dillon1000/react

expose `TestUtils.act()` for batching actions in tests (#14744)

* expose unstable_interact for batching actions in tests

* move to TestUtils

* move it all into testutils

* s/interact/act

* warn when calling hook-like setState outside batching mode

* pass tests

* merge-temp

* move jsdom test to callsite

* mark failing tests

* pass most tests (except one)

* augh IE

* pass fuzz tests

* better warning, expose the right batchedUpdates on TestRenderer for www

* move it into hooks, test for dom

* expose a flag on the host config, move stuff around

* rename, pass flow

* pass flow... again

* tweak .act() type

* enable for all jest environments/renderers; pass (most) tests.

* pass all tests

* expose just the warning from the scheduler

* don't return values

* a bunch of changes.

can't return values from .act
don't try to await .act calls
pass tests

* fixes and nits

* "fire events that udpates state"

* nit

* 🙄

* my bad

* hi andrew

(prettier fix)