Upgrade standard, code style fixes

Gemfile.lock

@@ -107,8 +107,8 @@ GEM
       mini_portile2 (~> 2.4.0)
     nokogiri (1.10.9-java)
     parallel (1.19.2)
-    parser (2.7.1.3)
-      ast (~> 2.4.0)
+    parser (2.7.1.4)
+      ast (~> 2.4.1)
     rack (2.2.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -145,19 +145,19 @@ GEM
       redis (>= 3.0.4)
     regexp_parser (1.7.1)
     rexml (3.2.4)
-    rubocop (0.85.1)
+    rubocop (0.89.1)
       parallel (~> 1.10)
-      parser (>= 2.7.0.1)
+      parser (>= 2.7.1.1)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.7)
       rexml
-      rubocop-ast (>= 0.0.3)
+      rubocop-ast (>= 0.3.0, < 1.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (0.0.3)
-      parser (>= 2.7.0.1)
-    rubocop-performance (1.6.1)
-      rubocop (>= 0.71.0)
+    rubocop-ast (0.3.0)
+      parser (>= 2.7.1.4)
+    rubocop-performance (1.7.1)
+      rubocop (>= 0.82.0)
     ruby-progressbar (1.10.1)
     simplecov (0.18.5)
       docile (~> 1.1)
@@ -171,9 +171,9 @@ GEM
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
     sqlite3 (1.4.2)
-    standard (0.4.7)
-      rubocop (~> 0.85.0)
-      rubocop-performance (~> 1.6.0)
+    standard (0.5.2)
+      rubocop (~> 0.89.1)
+      rubocop-performance (~> 1.7.1)
     thor (1.0.1)
     thread_safe (0.3.6)
     thread_safe (0.3.6-java)

lib/sidekiq.rb

@@ -198,7 +198,7 @@ module Sidekiq
   end
 
   def self.logger
-    @logger ||= Sidekiq::Logger.new(STDOUT, level: Logger::INFO)
+    @logger ||= Sidekiq::Logger.new($stdout, level: Logger::INFO)
   end
 
   def self.logger=(logger)

lib/sidekiq/manager.rb

@@ -56,7 +56,7 @@ module Sidekiq
     end
 
     # hack for quicker development / testing environment #2774
-    PAUSE_TIME = STDOUT.tty? ? 0.1 : 0.5
+    PAUSE_TIME = $stdout.tty? ? 0.1 : 0.5
 
     def stop(deadline)
       quiet

lib/sidekiq/web/application.rb

@@ -298,7 +298,7 @@ module Sidekiq
         self.class.run_afters(app, action)
       end
 
-      resp = case resp
+      case resp
       when Array
         # redirects go here
         resp
@@ -313,8 +313,6 @@ module Sidekiq
         # we'll let Rack calculate Content-Length for us.
         [200, headers, [resp]]
       end
-
-      resp
     end
 
     def self.helpers(mod = nil, &block)