Copy license to build output directory.

[adunkman]

@harvesthq/chosen-developers to fix #2945.

This adds a step to the build grunt task which copies LICENSE.md to the output directory… which should theoretically include it in the final build? I’m not 100% sure, because build process is a little 🌁.

Also, adds a package-lock.json, since it seems like we haven’t touched the dependencies in a while, and that’s a thing now.

[koenpunt]

Do we also need to add a license property to the package.json?

[koenpunt]

Curly braces are not necessary here, and since we don't use them anywhere in the Gruntfile I suggest we remove them.

[koenpunt]

Or even better, use the simplified, single-file syntax;

copy:
  main:
    src: 'LICENSE.md'
    dest: 'public/'

[adunkman]

Nice, I didn’t catch that syntax in the docs. I’ll update momentarily!

[stof]

Should we also update the package.json of the built package, to include the license file in the npm archive ?

[adunkman]

LICENSE (with any capitalization or extension) is automatically included in packages by npm — sorry, I should have mentioned that in the description (I had to look it up!):

Certain files are always included, regardless of settings:

• LICENSE / LICENCE

README, CHANGES, LICENSE & NOTICE can have any case and extension.

[stof]

then it is fine

[adunkman]

Force-pushed an updated commit with the Gruntfile modifications above. Thanks for the review!