Fix node addon tests (#865)

* Install naudiodon2 manually.

It is needed only when using a microphone. The CI tests don't need it.

nodejs-addon-examples/README.md

@@ -36,6 +36,9 @@ rm sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20.tar.bz2
 
 node ./test_asr_streaming_transducer.js
 
+# To run the test with microphone, you need to install the package naudiodon2
+npm install naudiodon2
+
 node ./test_asr_streaming_transducer_microphone.js
 ```
 
@@ -44,6 +47,10 @@ node ./test_asr_streaming_transducer_microphone.js
 ```bash
 wget https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/silero_vad.onnx
 
+
+# To run the test with microphone, you need to install the package naudiodon2
+npm install naudiodon2
+
 node ./test_vad_microphone.js
 ```
 

nodejs-addon-examples/package.json

@@ -1,6 +1,5 @@
 {
   "dependencies": {
-    "naudiodon2": "^2.4.0",
     "perf_hooks": "*",
     "sherpa-onnx-node": "*"
   }