Merge pull request #47 from daghdha/master

added note for pulsar-client-dev rather than pulsar-client
diff --git a/README.md b/README.md
index 0418c32..8f24c13 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,8 @@
 [Deb](https://pulsar.apache.org/docs/en/client-libraries-cpp/#deb) or
 [Homebrew packages](https://pulsar.apache.org/docs/en/client-libraries-cpp/#macos).
 
+(Note: you will need to install not only the pulsar-client library but also the pulsar-client-dev library)
+
 Also, this library works only in Node.js 10.x or later because it uses the
 [node-addon-api](https://github.com/nodejs/node-addon-api) module to wrap the C++ library.