Provide ES5 version of the worker file

doc/api/Miscellaneous/MultiThreading.md

@@ -380,3 +380,32 @@ if (currentModeInfo === null) {
   console.info("We're running completely in main thread.");
 }
 ```
+
+## Note about ES5 Environment
+
+By default, the Worker file will use es2017 features which should be compatible to a
+majority of devices.
+
+However, some older devices might not be compatible with it yet still compatible to the
+WebWorker API (and thus the `MULTI_THREAD` feature), yet not with ES2017. For those
+platforms, the RxPlayer also provide an ES5 variant of the Worker file:
+
+- The easiest way is to just import in your application its "embedded" version, exported
+  through the `"rx-player/experimental/features/embeds"` path:
+
+  ```js
+  import { EMBEDDED_WORKER_ES5 } from "rx-player/experimental/features/embeds";
+  ```
+
+  This allows to bypass the need to store and serve separately that file.
+
+  If you would prefer more control and a smaller bundle size, you may instead consider the
+  other following ways to it as a separate file.
+
+- With every release note published on GitHub as `worker.es5.js` (you should only use the
+  file linked to the RxPlayer's version you're using),
+
+- It is also available as `dist/worker.es5.js` from the root directory of the project
+  published on npm. As such, it might already be found in your project's directory, for
+  example in the `node_modules` directory (most probably in `node_modules/rx-player/dist/`
+  depending on your project).

package.json

@@ -243,8 +243,8 @@
     "ts-jest": "29.1.1",
     "ts-loader": "9.5.1",
     "typescript": "5.3.3",
-    "webpack": "5.89.0",
-    "webpack-cli": "5.1.4"
+    "webpack": "^5.90.3",
+    "webpack-cli": "^5.1.4"
   },
   "scripts-list": {
     "Build a demo page (e.g. to test a code change)": {