fix(core): update

ts/index.ts

@@ -60,4 +60,8 @@ export function base64ToArrayBuffer(base64: string): Uint8Array {
       arrayBuffer[i] = binaryString.charCodeAt(i);
   }
   return arrayBuffer;
-}
+}
+
+export function isArrayBufferLike(obj: any): obj is ArrayBufferLike {
+  return obj && typeof obj.byteLength === 'number';
+}