Fix line-item properties not getting through properly

CHANGELOG

@@ -1,3 +1,7 @@
+== Version 3.1.6
+
+* Add LineItem::Property resource
+
 == Version 3.1.5
 
 * Expose `orders` action on Customer

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    shopify_api (3.1.4)
+    shopify_api (3.1.6)
       activeresource (>= 3.0.0)
       thor (>= 0.14.4)
 

lib/shopify_api/resources/line_item.rb

@@ -1,4 +1,6 @@
 module ShopifyAPI
   class LineItem < Base 
+    class Property < Base
+    end
   end
 end

lib/shopify_api/version.rb

@@ -1,3 +1,3 @@
 module ShopifyAPI
-  VERSION = "3.1.5"
+  VERSION = "3.1.6"
 end