$ npm uninstall leaflet-markercluster --save# The closest version is 0.3.0:$ npm install email@example.com --save
This "unofficial" package has been published by an unknown soul back in 2013.
It has never been updated since then unfortunately.
Whereas the corresponding repository on GitHub has gone through many minor and major releases, and an "official" npm package has been published and is still currently maintained.
0.2.2 version is actually the same as the
0.2.0 that had been originally
published, but with this modified README.
The change of version is only to be able to publish to npm.
So that users who keep on downloading this
leaflet-markercluster (with a dash)
package will not suddenly get a broken build, but receive the deprecation notice.
And any future visitor of this page will get the information to use the
"official" package instead.
You might be interested in trying firstname.lastname@example.org + email@example.com, or firstname.lastname@example.org + email@example.com (latest releases as of time of writing).
Exact same story applies for leaflet-engine package.
It is an "unofficial" package (published by the same unknown soul back in 2013).
You should use the "official" leaflet npm package instead. It is published and maintained by the main authors of Leaflet.