add React 18 compatibility (#1326)

* bump dev dependencies to React 18

* setup Jest to include `IS_REACT_ACT_ENVIRONMENT`

* prefer `useId` from React 18 if it exists

In React 16 & 17, where `useId` doesn't exist, we will fallback to our
implementation we have been using up until now.

The `useId` exposed by React 18, ensures stable references even in SSR
environments.

* update expected events

React 18 now uses the proper events:
- `blur` -> `focusout`
- `focus` -> `focusin`

* ensure to wait a bit longer

This is a bit unfortunate, but since React 18 now does an extra
unmount/remount in `StrictMode` to ensure that your code is
ConcurrentMode ready, it takes a bit longer to settle what the DOM sees.

That said, this is a temporary "hack". We are going to experiment with
using tools like Puppeteer/Playwright to run our tests in an actual
browser instead to eliminate all the weird details that we have to keep
in mind.

* prefer `.focus()` over `fireEvent.focus(el)`

* abstract `microTask` polyfill code

* prefer our `focus(el)` function over `el.focus()`

Internally we would still use `el.focus()`, but this allows us to have
more control over that `focus` function.

* add React 18 to the React Playground

* improve hooks for React 18

- Improving the cleanup of useEffect hooks
- useIsoMorphicEffect instead of normal useEffect, so that we can use
  useLayoutEffect to be a bit quicker.

* improve disposables

- This allows us to add event listeners on a node, and get automatic
  cleanup once `dispose` gets called.
- We also return all the `d.add` calls, so that we can cleanup specific
  parts only instead of everything or nothing.

* reimplement the Transition component to be React 18 ready

* wait an additional frame for everything to settle

* update playground examples

* suppressConsoleLogs for RadioGroup components

* update changelog

* keep the `to` classes for a smoother transition

In the next transition we will remove _all_ classes provided and re-add
the once we need.

---

Some extra special thanks:

- Thanks @silvenon for your initial work on the `transition` events in #926
- Thanks @thecrypticace for doing late-night debugging sessions

Co-authored-by: =?UTF-8?q?Matija=20Marohni=C4=87?= <matija.marohnic@gmail.com>
Co-authored-by: Jordan Pittman <jordan@cryptica.me>

package.json

@@ -39,7 +39,7 @@
   "devDependencies": {
     "@swc/core": "^1.2.131",
     "@swc/jest": "^0.2.17",
-    "@testing-library/jest-dom": "^5.11.9",
+    "@testing-library/jest-dom": "^5.16.4",
     "@types/node": "^14.14.22",
     "esbuild": "^0.14.11",
     "fast-glob": "^3.2.11",