Empty class modifier (#19)

* empty value needs to be accounted for

* version bump

Author: matt-taylor

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    json_schematize (0.11.0)
+    json_schematize (0.13.0)
       class_composer (>= 1.0)
 
 GEM

lib/json_schematize/introspect_instance_methods.rb

@@ -9,6 +9,8 @@ def to_h
           [field.name, value.map(&:to_h)]
         elsif value.class == Class
           [field.name, value.to_s]
+        elsif value.class == JsonSchematize::EmptyValue
+          [field.name, nil]
         elsif JsonSchematize::Generator > value.class
           [field.name, value.to_h]
         else

lib/json_schematize/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module JsonSchematize
-  VERSION = "0.12.0"
+  VERSION = "0.13.0"
 end