rubocop: fix offences of the Style/MissingRespondToMissing cop

.rubocop_todo.yml

@@ -208,11 +208,3 @@ Style/MethodMissingSuper:
     - 'lib/pry/output.rb'
     - 'lib/pry/plugins.rb'
     - 'lib/pry/wrapped_module.rb'
-
-# Offense count: 4
-Style/MissingRespondToMissing:
-  Exclude:
-    - 'lib/pry/method.rb'
-    - 'lib/pry/method/disowned.rb'
-    - 'lib/pry/plugins.rb'
-    - 'lib/pry/wrapped_module.rb'

lib/pry/method.rb

@@ -496,6 +496,10 @@ class Pry
       @method.send(method_name, *args, &block)
     end
 
+    def respond_to_missing?(method_name, include_private = false)
+      @method.respond_to?(method_name) || super
+    end
+
     def comment
       Pry::Code.from_file(source_file).comment_describing(source_line)
     end

lib/pry/method/disowned.rb

@@ -54,6 +54,10 @@ class Pry
         Object.instance_method(:method_missing).bind(self)
           .call(meth_name, *args, &block)
       end
+
+      def respond_to_missing?(method_name, include_private = false)
+        !method(:name).respond_to?(method_name) || super
+      end
     end
   end
 end

lib/pry/plugins.rb

@@ -11,6 +11,10 @@ class Pry
       def method_missing(*_args)
         warn "Warning: The plugin '#{@name}' was not found! (no gem found)"
       end
+
+      def respond_to_missing?(*)
+        false
+      end
     end
 
     class Plugin

lib/pry/wrapped_module.rb

@@ -149,8 +149,8 @@ class Pry
       wrapped.send(method_name, *args, &block)
     end
 
-    def respond_to?(method_name, include_all = false)
-      super || wrapped.respond_to?(method_name, include_all)
+    def respond_to_missing?(method_name, include_private = false)
+      wrapped.respond_to?(method_name, include_private) || super
     end
 
     # Retrieve the source location of a module. Return value is in same