update devise to 2.2.5

Gemfile

@@ -15,7 +15,7 @@ gem "mysql2", group: :mysql
 gem "pg", group: :postgres
 # Auth
-gem "devise"
+gem "devise", '~> 2.2'
 gem 'omniauth', "~> 1.1.3"
 gem 'omniauth-google-oauth2'
 gem 'omniauth-twitter'

Gemfile.lock

@@ -49,7 +49,7 @@ GEM
     asciidoctor (0.1.3)
     awesome_print (1.1.0)
     backports (3.3.2)
-    bcrypt-ruby (3.0.1)
+    bcrypt-ruby (3.1.1)
     better_errors (0.9.0)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
@@ -111,7 +111,7 @@ GEM
     database_cleaner (1.0.1)
     debug_inspector (0.0.2)
     descendants_tracker (0.0.1)
-    devise (2.2.4)
+    devise (2.2.5)
       bcrypt-ruby (~> 3.0)
       orm_adapter (~> 0.1)
       railties (~> 3.1)
@@ -535,7 +535,7 @@ GEM
     virtus (0.5.5)
       backports (~> 3.3)
       descendants_tracker (~> 0.0.1)
-    warden (1.2.1)
+    warden (1.2.3)
       rack (>= 1.0)
     webmock (1.11.0)
       addressable (>= 2.2.7)
@@ -564,7 +564,7 @@ DEPENDENCIES
   coveralls
   d3_rails (~> 3.1.4)
   database_cleaner
-  devise
+  devise (~> 2.2)
   email_spec
   enumerize
   factory_girl_rails