Update sidekiq

Gemfile

@@ -81,8 +81,8 @@ gem "draper", "~> 0.18.0"
 
 # Background jobs
 gem 'slim'
-gem 'sinatra', :require => nil
-gem 'sidekiq', '2.6.4'
+gem 'sinatra', require: nil
+gem 'sidekiq', '2.7.3'
 
 # HTTP requests
 gem "httparty"

Gemfile.lock

@@ -393,7 +393,7 @@ GEM
     sexp_processor (4.1.3)
     shoulda-matchers (1.3.0)
       activesupport (>= 3.0.0)
-    sidekiq (2.6.4)
+    sidekiq (2.7.3)
       celluloid (~> 0.12.0)
       connection_pool (~> 1.0)
       multi_json (~> 1)
@@ -436,7 +436,7 @@ GEM
       rack (>= 1.0.0)
     thor (0.17.0)
     tilt (1.3.3)
-    timers (1.0.2)
+    timers (1.1.0)
     treetop (1.4.12)
       polyglot
       polyglot (>= 0.3.1)
@@ -530,7 +530,7 @@ DEPENDENCIES
   seed-fu
   settingslogic
   shoulda-matchers (= 1.3.0)
-  sidekiq (= 2.6.4)
+  sidekiq (= 2.7.3)
   simplecov
   sinatra
   six