revert msgpackr (#351)

## Why

the deserialization of the 'bin' type is different across msgpackr and
@msgpack/msgpack :(

see also: kriszyp/msgpackr#175

## What changed

go back to @msgpack/msgpack for now

## Versioning

- [ ] Breaking protocol change
- [ ] Breaking ts/js API change

<!-- Kind reminder to add tests and updated documentation if needed -->

Author: jackyzha0

codec/binary.ts

@@ -1,25 +1,48 @@
-import { Options, Packr } from 'msgpackr';
+import { DecodeError, ExtensionCodec, decode, encode } from '@msgpack/msgpack';
 import { Codec } from './types';
 
-const packr = new Packr({
-  useRecords: false,
-  moreTypes: true,
-  bundleStrings: true,
-  useTimestamp32: false,
-  useBigIntExtension: true,
-  skipValues: [undefined],
-} as Options);
+const BIGINT_EXT_TYPE = 0;
+const extensionCodec = new ExtensionCodec();
+extensionCodec.register({
+  type: BIGINT_EXT_TYPE,
+  encode(input: unknown): Uint8Array | null {
+    if (typeof input === 'bigint') {
+      if (
+        input <= Number.MAX_SAFE_INTEGER &&
+        input >= Number.MIN_SAFE_INTEGER
+      ) {
+        return encode(Number(input));
+      } else {
+        return encode(String(input));
+      }
+    } else {
+      return null;
+    }
+  },
+  decode(data: Uint8Array): bigint {
+    const val = decode(data);
+    if (!(typeof val === 'string' || typeof val === 'number')) {
+      throw new DecodeError(`unexpected BigInt source: ${typeof val}`);
+    }
+
+    return BigInt(val);
+  },
+});
 
 /**
- * Binary codec, uses [msgpackr](https://www.npmjs.com/package/msgpackr) under the hood
+ * Binary codec, uses [msgpack](https://www.npmjs.com/package/@msgpack/msgpack) under the hood
  * @type {Codec}
  */
 export const BinaryCodec: Codec = {
   toBuffer(obj) {
-    return packr.pack(obj);
+    return encode(obj, {
+      ignoreUndefined: true,
+      initialBufferSize: 512,
+      extensionCodec,
+    });
   },
   fromBuffer: (buff: Uint8Array) => {
-    const res: unknown = packr.unpack(buff);
+    const res = decode(buff, { extensionCodec });
     if (typeof res !== 'object' || res === null) {
       throw new Error('unpacked msg is not an object');
     }

codec/codec.test.ts

@@ -1,54 +1,47 @@
 import { describe, test, expect } from 'vitest';
 import { codecs } from '../testUtil/fixtures/codec';
 
-describe.each(codecs)('codec -- $name', ({ codec }) => {
-  test('empty object', () => {
-    const msg = {};
-    expect(codec.fromBuffer(codec.toBuffer(msg))).toStrictEqual(msg);
-  });
-
-  test('simple test', () => {
-    const msg = { abc: 123, def: 'cool' };
-    expect(codec.fromBuffer(codec.toBuffer(msg))).toStrictEqual(msg);
-  });
-
-  test('encodes null properly', () => {
-    const msg = { test: null };
-    expect(codec.fromBuffer(codec.toBuffer(msg))).toStrictEqual(msg);
-  });
-
-  test('encodes the empty buffer properly', () => {
-    const msg = { test: new Uint8Array(0) };
-    expect(codec.fromBuffer(codec.toBuffer(msg))).toStrictEqual(msg);
-  });
-
-  test('skips optional fields', () => {
-    const msg = { test: undefined };
-    expect(codec.fromBuffer(codec.toBuffer(msg))).toStrictEqual({});
-  });
-
-  test('encodes bigint properly', () => {
-    const msg = { big: BigInt(Number.MAX_SAFE_INTEGER) + BigInt(1) };
-    expect(codec.fromBuffer(codec.toBuffer(msg))).toStrictEqual(msg);
-  });
-
-  test('deeply nested test', () => {
-    const msg = {
+const examples: Array<{
+  name: string;
+  obj: Record<string, unknown>;
+  expected?: Record<string, unknown>;
+}> = [
+  { name: 'empty object', obj: {} },
+  { name: 'simple object', obj: { abc: 123, def: 'cool' } },
+  { name: 'non-utf8 string', obj: { test: '🇧🇪你好世界' } },
+  { name: 'null value', obj: { test: null } },
+  { name: 'empty buffer', obj: { test: new Uint8Array(0) } },
+  { name: 'optional field', obj: { test: undefined }, expected: {} },
+  {
+    name: 'bigint value',
+    obj: { big: BigInt(Number.MAX_SAFE_INTEGER) + BigInt(1) },
+  },
+  {
+    name: 'deeply nested',
+    obj: {
       array: [{ object: true }],
       deeply: {
         nested: {
           nice: null,
         },
       },
-    };
-    expect(codec.fromBuffer(codec.toBuffer(msg))).toStrictEqual(msg);
-  });
-
-  test('buffer test', () => {
-    const msg = {
+    },
+  },
+  {
+    name: 'buffer test',
+    obj: {
       buff: Uint8Array.from([0, 42, 100, 255]),
-    };
-    expect(codec.fromBuffer(codec.toBuffer(msg))).toStrictEqual(msg);
+    },
+  },
+];
+
+describe.each(codecs)('codec -- $name', ({ codec }) => {
+  describe.each(examples)('example -- $name', ({ obj, expected }) => {
+    test('encodes and decodes correctly', () => {
+      expect(codec.fromBuffer(codec.toBuffer(obj))).toStrictEqual(
+        expected ?? obj,
+      );
+    });
   });
 
   test('invalid json throws', () => {