Upgrading react-lottie from 1.x to 2.x

### Features

* add an `isSubframe` prop that is passed to lottie-web's `setSubframe()`, so `enterFrame` can fire only on whole After Effects frames, e.g. to trigger audio exactly on frame boundaries ([#71](https://github.com/chenqingspring/react-lottie/issues/71))
* expose `goToAndStop(frame, isFrame)` and `goToAndPlay(frame, isFrame)` on the component instance, which makes it possible to drive an animation from scroll position or jump to an exact frame/marker through a `ref` ([#40](https://github.com/chenqingspring/react-lottie/issues/40))

### Bug Fixes

* keep a playing animation running when an unrelated prop changes; added a regression test for the state-change pause reported in [#43](https://github.com/chenqingspring/react-lottie/issues/43)

### Bug Fixes

* apply the `segments` prop on mount, so an animation starts inside the requested range instead of playing the full timeline until the prop changes; an animation created with `autoplay: false` stays paused at the start of the range

This release folds in the changes that were prepared as 1.2.11 (never
published) and modernizes the development toolchain.

### Breaking Changes

* the `react` peer dependency is now `>=16.8.0` (previously `>=15.0.0`);
  React 15 is no longer supported. The component is tested against React 18
  and works with React 19.
* import animation JSON with a default import
  (`import animationData from './pinjump.json'`). A namespace import
  (`import * as animationData`) yields a frozen ESM module object that
  lottie-web cannot annotate, which fails under Vite and other strict ESM
  bundlers.

### Features

* add a `tabIndex` prop so presentational animations can be removed from the tab order ([#130](https://github.com/chenqingspring/react-lottie/issues/130))
* support the `renderer` option and document it in the README
* print a highlighted maintenance banner after `npm install` (maintained automatically by Relay; report bugs and feature requests on GitHub; https://get-relay.cc) and document it in the README

### Bug Fixes

* leave playback alone on re-renders unless a playback prop changed, so an `autoplay: false` animation no longer starts itself and a paused one is not restarted; a re-created but equal `segments` array no longer replays the animation ([#32](https://github.com/chenqingspring/react-lottie/issues/32), [#43](https://github.com/chenqingspring/react-lottie/issues/43))
* apply the initial `isStopped`, `isPaused` and `direction` props on mount instead of only on update
* replay changed segments immediately by passing `force` to `playSegments` ([#82](https://github.com/chenqingspring/react-lottie/issues/82))
* reload the animation when the remote `path` option changes ([#99](https://github.com/chenqingspring/react-lottie/issues/99))
* run the data/path reload on modern React instead of the deprecated `componentWillUpdate` ([#77](https://github.com/chenqingspring/react-lottie/issues/77))
* guard `destroy()` when the animation was never created ([#51](https://github.com/chenqingspring/react-lottie/issues/51))
* make the imperative `pause()` method actually pause, and stop restarting a paused animation on unrelated prop updates ([#58](https://github.com/chenqingspring/react-lottie/issues/58))
* drop the runtime dependency on `babel-runtime`, which broke consumers' builds ([#177](https://github.com/chenqingspring/react-lottie/issues/177))

Between react-lottie 1.2.10 and 2.1.0, Vigia found 0 removed exports, 0 changed signatures and 0 removed or changed class or interface members.

0 exports or members are newly marked as deprecated in react-lottie 2.1.0.