feat: add rerender as an alias for update (#149)

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### Summary

Users of `react-testing-library` use `rerender` wording instead of `update`. Let's make it easier for them by aliasing it.
See: https://testing-library.com/docs/react-testing-library/api#rerender

### Test plan

Added cases for JS tests and TS typings

src/__tests__/render.test.js

@@ -237,14 +237,15 @@ test('getAllByProp, queryAllByProps', () => {
 
 test('update', () => {
   const fn = jest.fn();
-  const { getByName, update } = render(<Banana onUpdate={fn} />);
+  const { getByName, update, rerender } = render(<Banana onUpdate={fn} />);
   const button = getByName('Button');
 
   button.props.onPress();
 
   update(<Banana onUpdate={fn} />);
+  rerender(<Banana onUpdate={fn} />);
 
-  expect(fn).toHaveBeenCalledTimes(2);
+  expect(fn).toHaveBeenCalledTimes(3);
 });
 
 test('unmount', () => {

src/render.js

@@ -27,6 +27,7 @@ export default function render(
     ...getByAPI(instance),
     ...queryByAPI(instance),
     update: updateWithAct(renderer),
+    rerender: updateWithAct(renderer), // alias for `update`
     unmount: renderer.unmount,
     toJSON: renderer.toJSON,
     debug: debug(instance, renderer),