[ruby/net-http] Bump up 0.6.0

ruby/net-http@6475fa68ba

Author: hsbt

lib/net/http.rb

@@ -730,7 +730,7 @@ class HTTPHeaderSyntaxError < StandardError; end
   class HTTP < Protocol
 
     # :stopdoc:
-    VERSION = "0.5.0"
+    VERSION = "0.6.0"
     HTTPVersion = '1.1'
     begin
       require 'zlib'