Implement Configuration class manually

AS's Configurable is an overkill for our usecase and not worth adding
entire AS as a dependency.

lib/tapping_device.rb

@@ -6,7 +6,7 @@
 require "tapping_device/payload"
 require "tapping_device/output"
 require "tapping_device/trackable"
-require "tapping_device/configurable"
+require "tapping_device/configuration"
 require "tapping_device/exceptions"
 require "tapping_device/method_hijacker"
 require "tapping_device/trackers/initialization_tracker"
@@ -27,7 +27,6 @@ class TappingDevice
 
   extend Manageable
 
-  include Configurable
   include Output::Helpers
 
   def initialize(options = {}, &block)

lib/tapping_device/configurable.rb → lib/tapping_device/configuration.rb

@@ -1,10 +1,5 @@
-require "active_support/configurable"
-require "active_support/concern"
-
 class TappingDevice
-  module Configurable
-    extend ActiveSupport::Concern
-
+  class Configuration
     DEFAULTS = {
       filter_by_paths: [],
       exclude_by_paths: [],
@@ -16,12 +11,24 @@ module Configurable
       only_private: false
     }.merge(TappingDevice::Output::DEFAULT_OPTIONS)
 
-    included do
-      include ActiveSupport::Configurable
+    def initialize
+      @options = {}
 
       DEFAULTS.each do |key, value|
-        config[key] = value
+        @options[key] = value
       end
     end
+
+    def [](key)
+      @options[key]
+    end
+
+    def []=(key, value)
+      @options[key] = value
+    end
+  end
+
+  def self.config
+    @config ||= Configuration.new
   end
 end

spec/configurable_spec.rb

@@ -6,7 +6,7 @@
   around do |example|
     example.run
 
-    TappingDevice::Configurable::DEFAULTS.each do |key, value|
+    TappingDevice::Configuration::DEFAULTS.each do |key, value|
       TappingDevice.config[key] = value
     end
   end