Inline disabling Style/MethodMissing Cop

To make it obvious that these are non-standard cases.

Also add respond_to_missing? to the decorator.

We are using Style/MethodMissing rather than
Style/MethodMissingSuper and Style/MissingRespondToMissing because we
are still on RuboCop 0.54.

.rubocop.yml

@@ -21,13 +21,6 @@ Style/SymbolArray:
 Style/FormatStringToken:
   Enabled: false
 
-Style/MethodMissing:
-  Exclude:
-    - 'lib/factory_bot/decorator.rb'
-    - 'lib/factory_bot/decorator/invocation_tracker.rb'
-    - 'lib/factory_bot/definition_proxy.rb'
-    - 'lib/factory_bot/evaluator.rb'
-
 # TODO: gradually bring this down to 80 as we fix files
 # Let's not open a big PR to fix all of these at once - 
 # we can fix gradually if we happen to be editing a file that has a violation

lib/factory_bot/decorator.rb

@@ -6,10 +6,14 @@ module FactoryBot
       @component = component
     end
 
-    def method_missing(name, *args, &block)
+    def method_missing(name, *args, &block) # rubocop:disable Style/MethodMissing
       @component.send(name, *args, &block)
     end
 
+    def respond_to_missing?(name, include_private = false)
+      @component.respond_to?(name, true) || super
+    end
+
     def send(symbol, *args, &block)
       __send__(symbol, *args, &block)
     end

lib/factory_bot/decorator/invocation_tracker.rb

@@ -6,7 +6,7 @@ module FactoryBot
         @invoked_methods = []
       end
 
-      def method_missing(name, *args, &block)
+      def method_missing(name, *args, &block) # rubocop:disable Style/MethodMissing
         @invoked_methods << name
         super
       end

lib/factory_bot/definition_proxy.rb

@@ -72,7 +72,7 @@ module FactoryBot
     #   end
     #
     # are equivalent.
-    def method_missing(name, *args, &block)
+    def method_missing(name, *args, &block) # rubocop:disable Style/MethodMissing
       if args.empty?
         __declare_attribute__(name, block)
       elsif args.first.respond_to?(:has_key?) && args.first.has_key?(:factory)

lib/factory_bot/evaluator.rb

@@ -37,7 +37,7 @@ module FactoryBot
       @instance = object_instance
     end
 
-    def method_missing(method_name, *args, &block)
+    def method_missing(method_name, *args, &block) # rubocop:disable Style/MethodMissing
       if @instance.respond_to?(method_name)
         @instance.send(method_name, *args, &block)
       else