Merge pull request #165 from twitter/kill-1.8.7

Print deprecation warning for 1.8.7 users.

Author: oreoshake

lib/secure_headers.rb

@@ -39,6 +39,9 @@ def secure_headers_options
     end
 
     def ensure_security_headers options = {}
+      if RUBY_VERSION == "1.8.7"
+        warn "[DEPRECATION] secure_headers ruby 1.8.7 support will dropped in the next release"
+      end
       self.secure_headers_options = options
       before_filter :prep_script_hash
       before_filter :set_hsts_header

lib/secure_headers/version.rb

@@ -1,3 +1,3 @@
 module SecureHeaders
-  VERSION = "2.2.3"
+  VERSION = "2.2.4"
 end