Replace dep on dry-configurable with a simple Configuration mod

dry-container.gemspec

@@ -30,7 +30,6 @@ Gem::Specification.new do |spec|
 
   # to update dependencies edit project.yml
   spec.add_runtime_dependency "concurrent-ruby", "~> 1.0"
-  spec.add_runtime_dependency "dry-configurable", "~> 0.13", ">= 0.13.0"
 
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake"

lib/dry/container.rb

@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require "dry-configurable"
 require "dry/container/error"
 require "dry/container/namespace"
 require "dry/container/registry"

lib/dry/container/mixin.rb

@@ -4,6 +4,46 @@
 
 module Dry
   class Container
+    # @api public
+    class Config
+      DEFAULT_NAMESPACE_SEPARATOR = "."
+      DEFAULT_RESOLVER = Resolver.new
+      DEFAULT_REGISTRY = Registry.new
+
+      # @api public
+      attr_accessor :namespace_separator
+
+      # @api public
+      attr_accessor :resolver
+
+      # @api public
+      attr_accessor :registry
+
+      # @api private
+      def initialize(
+        namespace_separator: DEFAULT_NAMESPACE_SEPARATOR,
+        resolver: DEFAULT_RESOLVER,
+        registry: DEFAULT_REGISTRY
+      )
+        @namespace_separator = namespace_separator
+        @resolver = resolver
+        @registry = registry
+      end
+    end
+
+    # @api public
+    module Configuration
+      # @api public
+      def config
+        @config ||= Config.new
+      end
+
+      # @api public
+      def configure
+        yield config
+      end
+    end
+
     PREFIX_NAMESPACE = lambda do |namespace, key, config|
       [namespace, key].join(config.namespace_separator)
     end
@@ -45,13 +85,9 @@ def inherited(subclass)
         end
 
         base.class_eval do
-          extend ::Dry::Configurable
+          extend Configuration
           extend hooks_mod
 
-          setting :registry, default: Dry::Container::Registry.new
-          setting :resolver, default: Dry::Container::Resolver.new
-          setting :namespace_separator, default: "."
-
           @_container = ::Concurrent::Hash.new
         end
       end
@@ -67,13 +103,9 @@ def initialize(*args, &block)
       # @private
       def self.included(base)
         base.class_eval do
-          extend ::Dry::Configurable
+          extend Configuration
           prepend Initializer
 
-          setting :registry, default: Dry::Container::Registry.new
-          setting :resolver, default: Dry::Container::Resolver.new
-          setting :namespace_separator, default: "."
-
           def config
             self.class.config
           end