Use npm-standard license metadata

[kemitchell]

Matt,

Many thanks for this package! I've used it in all kinds of projects. I really, really like the approach.

This tiny PR fixes the license metadata in package.json to conform to npm's guidelines. Fair is fair: I was involved in writing those guidelines. The idea is to make it easy to automate license checks even for really deep node_modules directories. Running an automatic tool is exactly what tipped me off about http-hash.

The old licenses Array was definitely a thing in the early days of node, which took a lot from RubyGems. I believe the original CommonJS spec actually mentioned it. For various reasons, it's turned out to be noisier and less expressive than proper SPDX (license metadata standard) expressions.

I can't answer legal questions, but if you have any questions about metadata or the npm guidelines, feel free to hit me up.

Again, thanks very much for the package!

Best,

K

[coveralls]

Coverage remained the same at 100.0% when pulling c2cc77d on kemitchell:standard-license-metadata into 6e4bafe on Matt-Esch:master.