A few observations, easy fixes to get working

[dshawth]

Using NPM 6.4.1 and Leaflet 1.3.3:

Missing a 'main' in package.json; should be leaflet.mousecoordinate/dist/leaflet.mousecoordinate.min.js this field enhances imports in VUE and other modern stacks.

Currently version 1.2.0 is in the NPM repo; npm install --save leaflet.mousecoordinate results in a non-working extension whereas npm install --save https://github.com/PowerPan/leaflet.mouseCoordinate.git installs 1.3.0. It might be worth committing the newer version to npm so everyone can enjoy it.

This is an amazing and useful extension, keep up the good work!