fix: b64encode param type (#2832)

Author: timreichen

src/jsonify/stringify.ts

@@ -109,7 +109,7 @@ function serializeInner(
     } else if (value instanceof RegExp) {
       str += `["RegExp",${JSON.stringify(value.source)}, "${value.flags}"]`;
     } else if (value instanceof Uint8Array) {
-      str += `["Uint8Array","${b64encode(value)}"]`;
+      str += `["Uint8Array","${b64encode(value.buffer)}"]`;
     } else if (value instanceof Set) {
       const items = new Array(value.size);
       let i = 0;
@@ -161,7 +161,7 @@ const base64abc = [
  * CREDIT: https://gist.github.com/enepomnyaschih/72c423f727d395eeaa09697058238727
  * Encodes a given Uint8Array, ArrayBuffer or string into RFC4648 base64 representation
  */
-export function b64encode(buffer: ArrayBuffer): string {
+export function b64encode(buffer: ArrayBufferLike): string {
   const uint8 = new Uint8Array(buffer);
   let result = "",
     i;