chore(deps): update dependency sidekiq to v7 [security]

Gemfile

@@ -40,7 +40,7 @@ gem 'ruby-filemagic', '~> 0.7'
 gem 'rubyzip', '~> 2.0'
 gem 'sentry-raven', '~> 3.0'
 gem 'sepa_king', '~> 0.11'
-gem 'sidekiq', '~> 6.0'
+gem 'sidekiq', '~> 7.0'
 gem 'sidekiq-scheduler', '~> 5.0', '>= 5.0.2'
 gem 'slack-notifier', '~> 2.0'
 gem 'validates_timeliness', '~> 7.0.0.beta2'

Gemfile.lock

@@ -128,7 +128,7 @@ GEM
     coderay (1.1.3)
     colorize (0.8.1)
     concurrent-ruby (1.2.2)
-    connection_pool (2.3.0)
+    connection_pool (2.4.1)
     consistency_fail (0.3.7)
     counter_culture (3.2.1)
       activerecord (>= 4.2)
@@ -327,7 +327,7 @@ GEM
     raabro (1.4.0)
     racc (1.6.2)
     racc (1.6.2-java)
-    rack (2.2.7)
+    rack (2.2.8)
     rack-attack (6.6.0)
       rack (>= 1.0, < 3)
     rack-cors (2.0.1)
@@ -372,6 +372,8 @@ GEM
       ffi (~> 1.0)
     rb-readline (0.5.5)
     redis (4.8.1)
+    redis-client (0.17.0)
+      connection_pool
     regexp_parser (2.2.1)
     request_store (1.5.1)
       rack (>= 1.4)
@@ -460,10 +462,11 @@ GEM
       iban-tools
       nokogiri
     shellany (0.0.1)
-    sidekiq (6.5.8)
-      connection_pool (>= 2.2.5, < 3)
-      rack (~> 2.0)
-      redis (>= 4.5.0, < 5)
+    sidekiq (7.1.4)
+      concurrent-ruby (< 2)
+      connection_pool (>= 2.3.0)
+      rack (>= 2.2.4)
+      redis-client (>= 0.14.0)
     sidekiq-scheduler (5.0.2)
       rufus-scheduler (~> 3.2)
       sidekiq (>= 6, < 8)
@@ -593,7 +596,7 @@ DEPENDENCIES
   rubyzip (~> 2.0)
   sentry-raven (~> 3.0)
   sepa_king (~> 0.11)
-  sidekiq (~> 6.0)
+  sidekiq (~> 7.0)
   sidekiq-scheduler (~> 5.0, >= 5.0.2)
   simplecov
   slack-notifier (~> 2.0)