Version mismatch npm 0.0.1 == plugin 0.1.5

[wrightsonm]

I have noticed that npm version and plugin.xml version are different

https://www.npmjs.com/package/cordova-install-referrer-api - version 0.0.1
https://github.com/byorty/cordova-install-referrer-api/blob/master/plugin.xml - version 0.1.5

This is only a very minor issue and doesn't break anything.
Only noticed as it was flagged up by this plugin update tool:

$ npm install -g cordova-check-plugins
$ cordova-check-plugins --update=auto