fix(httpclient): Report node.js version on user-agent

Author: trodrigues

lib/create-http-client.js

@@ -23,6 +23,10 @@ export default function createHttpClient (axios: Object, {space, accessToken, in
   headers['Content-Type'] = 'application/vnd.contentful.delivery.v1+json'
   headers['X-Contentful-User-Agent'] = 'contentful.js/' + packageFile.version
 
+  if (process && process.release && process.release.name === 'node') {
+    headers['user-agent'] = 'node.js/' + process.version
+  }
+
   return axios.create({
     baseURL: `${insecure ? 'http' : 'https'}://${hostname}:${port}/spaces/${space}/`,
     headers: headers,