Make samples disposable

src/input.ts

@@ -8,10 +8,12 @@
 
 import { Demuxer } from './demuxer';
 import { InputFormat } from './input-format';
-import { assert } from './misc';
+import { assert, polyfillSymbolDispose } from './misc';
 import { Reader } from './reader';
 import { Source } from './source';
 
+polyfillSymbolDispose();
+
 /**
  * The options for creating an Input object.
  * @group Input files & tracks
@@ -24,10 +26,6 @@ export type InputOptions<S extends Source = Source> = {
 	source: S;
 };
 
-// https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-2.html
-// @ts-expect-error Readonly
-Symbol.dispose ??= Symbol('Symbol.dispose');
-
 /**
  * Represents an input media file. This is the root object from which all media read operations start.
  * @group Input files & tracks