tweaks to code to make bundler work

aspen.gemspec

@@ -4,7 +4,7 @@ require "aspen/version"
 
 Gem::Specification.new do |s|
   s.name        = "aspen"
-  s.version     = Aspen::VERSION
+  s.version     = Aspen::VERSION::STRING
   s.platform    = Gem::Platform::CURRENT
   s.authors     = ["Kevin Williams"]
   s.email       = ["kevwil@gmail.com"]

lib/aspen.rb

@@ -5,3 +5,7 @@
 
 require 'rack'
 require 'aspen/version'
+
+module Aspen
+  # should I use autoload?
+end

lib/aspen/version.rb

@@ -12,7 +12,7 @@ module VERSION
     TINY     = 0
 
     # version digits joined as a string
-    STRING   = [MAJOR, MINOR, TINY].join('.')
+    STRING   = [MAJOR, MINOR, TINY].join('.').freeze
 
     # Rack protocol version
     RACK     = [1, 1].freeze