Add BufferSource type

Author: max-lt

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@openworkers/workers-types",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "TypeScript types for the OpenWorkers runtime",
   "license": "MIT",
   "repository": {

types/encoding.d.ts

@@ -1,5 +1,13 @@
 // Encoding API types
 
+type BufferSource = ArrayBuffer | ArrayBufferView;
+
+interface ArrayBufferView {
+  buffer: ArrayBuffer;
+  byteLength: number;
+  byteOffset: number;
+}
+
 declare class TextEncoder {
   readonly encoding: string;
   encode(input?: string): Uint8Array;