describe Node-Osmium as not maintained

Author: matkoniecz

node-osmium/index.html

@@ -15,6 +15,8 @@ <h2>Features</h2>
 some of the features of the <a href="/libosmium/">Osmium Library</a> from
 Javascript code.</p>
 
+<p>Note that currently this project is not maintained and its repository is archived.</p>
+
 <h2>Code</h2>
 
 <p>The code is available from GitHub: <a href="https://github.com/osmcode/node-osmium">github.com/osmcode/node-osmium</a>.</p>