currency.rb in shopify-money-0.15.0

- old
+ new

@@ -48,9 +48,13 @@
 
     def eql?(other)
       self.class == other.class && iso_code == other.iso_code
     end
 
+    def hash
+      [ self.class, iso_code ].hash
+    end
+
     def compatible?(other)
       other.is_a?(NullCurrency) || eql?(other)
     end
 
     alias_method :==, :eql?