hash-utils.rb in hash-utils-1.0.0

- old
+ new

@@ -6,9 +6,10 @@
 require "hash-utils/file"
 require "hash-utils/gem"
 require "hash-utils/hash"
 require "hash-utils/io"
 require "hash-utils/module"
+require "hash-utils/nil"
 require "hash-utils/numeric"
 require "hash-utils/object"
 require "hash-utils/proc"
 require "hash-utils/string"
 require "hash-utils/stringio"