Add package.json to handle module dependencies and versioning

[saebekassebil]

Adding a package.json is considered best-practice and would possibly make it a whole lot easier to handle module dependencies (from npm) and it would be a great place to contain metadata such as version.

With package.json dependencies could be installed with just npm install and it would be a good starting point to add other external dependencies.

[jarl-dk]

:+1:

[mzedeler]

I suppose that you mean build dependencies, right? In that case, the commit above should include a few more packages.

[saebekassebil]

Pulled in 1d1af9531e1deba5d42c90ffe4b061408a69f7a1