create a minimal yeoman generator scaffolding

It will setup jslint and mocha for testing of the generator.

Prerequisites

• npm ^5.2.0

Example

1. Change into the directory of your "scope" or (for unscoped packages) where your global packages are.
2. Create a directory with name of your new generator. Convention is lower case and dash-separated, and must start with "generator-", here we assume we want to generate "some-stuff":

mkdir generator-some-stuff

1. Change into this directory

cd generator-some-stuff

1. Create scaffolding of a generator. You will be asked for some global settings, which will be saved in package.json:

npx -p @pubcore/generator-create -p yo yo @pubcore/create

1. Test creation by execute prepared test:

   npm run test

2. Start build you generator in app/index.js, levearge yeoman's docs: https://yeoman.io/authoring/running-context.html