fix: Use named export instead of default export

Author: mochatek

README.md

@@ -26,7 +26,7 @@ npm install protobuf-array-stream
 First, you need to load your Protocol Buffer definitions. The library exposes these methods directly from protobufjs for convenience:
 
 ```typescript
-import RepeatedFieldStream from "protobuf-array-stream";
+import { RepeatedFieldStream } from "protobuf-array-stream";
 import { createReadStream } from "fs";
 
 // 1. Load from a .proto file (async)

src/index.ts

@@ -1,5 +1,5 @@
 import { Transform, TransformCallback } from "stream";
-import * as protobuf from "protobufjs";
+import protobuf from "protobufjs";
 import { DATA_TYPES, WIRE_TYPES, MASKS, TOKENS, ERRORS } from "./constants";
 import RepeatedFieldStreamError from "./errors";
 
@@ -397,4 +397,4 @@ class RepeatedFieldStream<T = unknown> extends Transform {
   }
 }
 
-export default RepeatedFieldStream;
+export { RepeatedFieldStream };

test/index.test.ts

@@ -1,7 +1,7 @@
 import test from "node:test";
 import assert from "node:assert/strict";
 import { Writable } from "stream";
-import RepeatedFieldStream from "../src";
+import { RepeatedFieldStream } from "../src";
 
 // Test message definitions
 const proto = `