wasm-bindgen-rayon and new OMT plugin (#1007)

* WIP: wasm-bindgen-rayon and new OMT plugin

* Bump package-lock

* Make OMT work again

* Update year

* Restore accidental change

* Prevent minification of `nextDefineUri`

* Delay loading external deps

This gives inline `define` calls a chance to define dependencies for earlier `define` calls on the same page.

* Add comment

codecs/oxipng/pkg-parallel/squoosh_oxipng.d.ts

@@ -7,25 +7,43 @@
 */
 export function optimise(data: Uint8Array, level: number): Uint8Array;
 /**
-* @param {number} num
-* @returns {any}
+* @param {number} num_threads
+* @returns {Promise<any>}
 */
-export function worker_initializer(num: number): any;
+export function initThreadPool(num_threads: number): Promise<any>;
+/**
+* @param {number} receiver
+*/
+export function wbg_rayon_start_worker(receiver: number): void;
 /**
 */
-export function start_main_thread(): void;
+export class wbg_rayon_PoolBuilder {
+  free(): void;
+/**
+* @returns {number}
+*/
+  numThreads(): number;
+/**
+* @returns {number}
+*/
+  receiver(): number;
 /**
 */
-export function start_worker_thread(): void;
+  build(): void;
+}
 
 export type InitInput = RequestInfo | URL | Response | BufferSource | WebAssembly.Module;
 
 export interface InitOutput {
   readonly optimise: (a: number, b: number, c: number, d: number) => void;
-  readonly worker_initializer: (a: number) => number;
-  readonly start_main_thread: () => void;
-  readonly start_worker_thread: () => void;
+  readonly __wbg_wbg_rayon_poolbuilder_free: (a: number) => void;
+  readonly wbg_rayon_poolbuilder_numThreads: (a: number) => number;
+  readonly wbg_rayon_poolbuilder_receiver: (a: number) => number;
+  readonly wbg_rayon_poolbuilder_build: (a: number) => void;
+  readonly initThreadPool: (a: number) => number;
+  readonly wbg_rayon_start_worker: (a: number) => void;
   readonly __wbindgen_export_0: WebAssembly.Memory;
+  readonly __wbindgen_add_to_stack_pointer: (a: number) => number;
   readonly __wbindgen_malloc: (a: number) => number;
   readonly __wbindgen_free: (a: number, b: number) => void;
   readonly __wbindgen_start: () => void;
@@ -41,4 +59,3 @@ export interface InitOutput {
 * @returns {Promise<InitOutput>}
 */
 export default function init (module_or_path?: InitInput | Promise<InitInput>, maybe_memory?: WebAssembly.Memory): Promise<InitOutput>;
-