Fix session value expires typo;

Captcha input field disable autocomplete, and set field type as  for shown correct keyboard on mobile view.
version 0.2.5

CHANGELOG.md

@@ -1,7 +1,8 @@
-0.2.2
+0.2.5
 -----
 
 - Add `session[:_rucaptcha]` expire time, for protect Rails CookieSession Replay Attack.
+- Captcha input field disable autocomplete, and set field type as `email` for shown correct keyboard on mobile view.
 
 0.2.3
 -----

lib/rucaptcha/controller_helpers.rb

@@ -8,7 +8,7 @@ module RuCaptcha
 
     def generate_rucaptcha
       session[:_rucaptcha]   = RuCaptcha::Captcha.random_chars
-      session[:rucaptcha_at] = Time.now.to_i
+      session[:_rucaptcha_at] = Time.now.to_i
 
       RuCaptcha::Captcha.create(session[:_rucaptcha])
     end

lib/rucaptcha/version.rb

@@ -1,3 +1,3 @@
 module RuCaptcha
-  VERSION = '0.2.4'
+  VERSION = '0.2.5'
 end

lib/rucaptcha/view_helpers.rb

@@ -2,6 +2,8 @@ module RuCaptcha
   module ViewHelpers
     def rucaptcha_input_tag(opts = {})
       opts[:name] = '_rucaptcha'
+      opts[:type] = 'email'
+      opts[:autocomplete] = 'off'
       tag(:input, opts)
     end