Support for non_null fields

[jtrees]

I expect the following schema...

defmodule Foo do
  embedded_schema do
    field(:hello, :string, null: false)
  end
end

... to result in an absinthe schema that looks like this:

input_object :foo do
  field(:hello, non_null(:string))
end

[elridion]

I will have a look into it.
I'm not entirely sure if it is possible do access the opts externally.

In the mean time, to fix this it is possible to overwrite fields in the object definition.

dilute_input_object Foo do
  field(:hello, non_null(:string))
end

[jtrees]

This is the workaround I have been using so far. Thanks.