Fixed wrong urls in the README.md
file included in the npm package.
Introduced the new Node.js SDK, which is available on the public npm service at the following address:
https://www.npmjs.com/package/lightstreamer-jms-web-client.
Previously, the Node.js library was available as part of the SDK for JavaScript Clients, now called SDK for Web Clients.
Note that this Client library has he same characteristics of the library in the current SDK for Web Clients version 2.0.0, and you can refer
to that SDK for the changelog with respect to previous versions.