Support node v12

This release addresses the v8 API changes in node v12. It also fixes a number of deprecation warnings.

fixed uncaught error

Version 2.2.0 to 2.2.1

• changed uncatchable error into "error" event on the browser (marcooliveira)

We're back!

Merge pull request #84 from ronkorving/master

Get node_mdns up to speed