Accessing settings as strings via #[]

[waiting-for-dev]

Describe the bug

Before the update to 0.11, a setting could be referenced via a string through config.[]. Now it must be a symbol, otherwise the setting is not found.

I'd like to know if it's desired behavior. If not, I can send a patch myself.

To Reproduce

class A
  extend Dry::Configurable

  setting :foo, :bar
end

A.config[:foo]
# => :bar
A.config["foo"]
# => ArgumentError (+foo+ is not a setting name)

Expected behavior

A.config["foo"]
# => :bar

Your environment

Affects two gems I maintain:

waiting-for-dev/warden-jwt_auth#21
waiting-for-dev/devise-jwt#159

[solnic]

I can send a patch myself.

Please do. My intention was to maintain public API behavior.