feat: 🎸 add support for Buffer in CBOR codec

Author: streamich

src/cbor/CborEncoder.ts

@@ -40,6 +40,9 @@ export class CborEncoder<W extends IWriter & IWriterGrowable = IWriter & IWriter
             const buf = (value as JsonPackValue).val;
             return this.writer.buf(buf, buf.length);
           default:
+            if (value instanceof Uint8Array) return this.writeBin(value);
+            if (Array.isArray(value)) return this.writeArr(value);
+            if (value instanceof Map) return this.writeMap(value);
             return this.writeUnknown(value);
         }
       }

src/cbor/__tests__/CborEncoder.spec.ts

@@ -135,6 +135,13 @@ describe('binary', () => {
     const decoded = decode(encoded) as Buffer;
     expect(toUint8Array(decoded)).toStrictEqual(new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8, 9]));
   });
+
+  test('can encode Buffer', () => {
+    const buf = Buffer.from('asdf');
+    const encoded = encoder.encode(buf);
+    const decoded = toUint8Array(decode(encoded));
+    expect(decoded).toStrictEqual(toUint8Array(buf));
+  });
 });
 
 describe('strings', () => {