update sidekiq

Gemfile

@@ -29,7 +29,7 @@ gem 'haml-rails'
 # Background jobs
 gem 'slim'
 gem 'sinatra', :require => nil
-gem 'sidekiq', '2.6.4'
+gem 'sidekiq'
 # Scheduled
 gem 'whenever', require: false

Gemfile.lock

@@ -72,7 +72,7 @@ GEM
     erubis (2.7.0)
     execjs (1.4.0)
       multi_json (~> 1.0)
-    facter (1.6.17)
+    facter (1.6.18)
     factory_girl (4.1.0)
       activesupport (>= 3.0.0)
     factory_girl_rails (4.1.0)
@@ -160,7 +160,7 @@ GEM
       ffi (>= 0.5.0)
     rdoc (3.12.2)
       json (~> 1.4)
-    redis (3.0.2)
+    redis (3.0.3)
     redis-namespace (1.2.1)
       redis (~> 3.0.0)
     rest-client (1.6.7)
@@ -191,7 +191,7 @@ GEM
     settingslogic (2.0.8)
     shoulda-matchers (1.3.0)
       activesupport (>= 3.0.0)
-    sidekiq (2.6.4)
+    sidekiq (2.9.0)
       celluloid (~> 0.12.0)
       connection_pool (~> 1.0)
       multi_json (~> 1)
@@ -221,7 +221,7 @@ GEM
       libv8 (~> 3.3.10)
     thor (0.18.1)
     tilt (1.3.6)
-    timers (1.0.2)
+    timers (1.1.0)
     treetop (1.4.12)
       polyglot
       polyglot (>= 0.3.1)
@@ -274,7 +274,7 @@ DEPENDENCIES
   sass-rails (~> 3.2.3)
   settingslogic
   shoulda-matchers
-  sidekiq (= 2.6.4)
+  sidekiq
   sinatra
   slim
   stamp