3.0.0

After almost 3 years of usage of this library in our product, we did found a lot of little things to improve:

• createConfig now returns useConfig and useAdminConfig react hooks
  • You can also namespace thoses methods with configNamespace to avoid name conflicts
• createConfig take a simple schema props to describe the shape of your configuration
  • type, description, and constraints are now on the same place
  • the default can take a function to have a more reactive config (no more need to reload the application to have the latest config)
• useAdminConfig is more smart about types and give a nice framework to build an admnistration page