Fixes bignum conversions

lib/v8.rb

@@ -19,6 +19,7 @@
 require 'v8/conversion/symbol'
 require 'v8/conversion/string'
 require 'v8/conversion/fixnum'
+require 'v8/conversion/bignum'
 require 'v8/conversion'
 require 'v8/access/names'
 require 'v8/access/indices'

lib/v8/conversion.rb

@@ -18,7 +18,7 @@ def to_v8(ruby_object)
   end
 end
 
-for type in [Class, Object, Array, Hash, String, Symbol, Time, Proc, Method, Fixnum] do
+for type in [Class, Object, Array, Hash, String, Symbol, Time, Proc, Method, Fixnum, Bignum] do
   type.class_eval do
     include V8::Conversion.const_get(type.name)
   end

lib/v8/conversion/bignum.rb

@@ -0,0 +1,11 @@
+class V8::Conversion
+  module Bignum
+    def to_ruby
+      self
+    end
+
+    def to_v8
+      self.to_f.to_v8
+    end
+  end
+end