New maintainer and plan

[parro-it]

Hi, I'm the new maintainer of this repository.
Sven Willner is transferring repo and npm ownership to me.

I'm working in the meteorological field for almost an year, and I'll
use this module at work, so I think I could commit a fair number of hours to
work on this.

Within some days, I release a first minor version on npm,
where I'll:

• merge PR Update for new v8 API (node v12) #22 to allow to use Node 12
• upgrade dependencies in order to fix security issues
• port CI tests to GitHub actions

On a more long timeframe, I think I'll to port the code to NAPI, in order to leverage
it's ABI compatibility. This will avoid the necessity to change the code for every new
Node version that will be released, and will open the way to publish pre-compiled version
on NPM.

[guigrpa]

@parro-it Since PR#22 has been merged, what are the current plans for a new release? Even if it's only for Node v12 support, I think it'd be very useful for the library's users. Thanks for the effort!