Bump rubocop from 0.52.1 to 0.54.0

Bumps [rubocop](https://github.com/bbatsov/rubocop) from 0.52.1 to 0.54.0.
- [Release notes](https://github.com/bbatsov/rubocop/releases)
- [Changelog](https://github.com/bbatsov/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v0.52.1...v0.54.0)

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -18,7 +18,7 @@ group :development do
 
   gem "factory_bot", "~> 4.8.2"
   gem "rspec", "~> 3.7.0"
-  gem "rubocop", "~> 0.52.1"
+  gem "rubocop", "~> 0.54.0"
   gem "webmock", "~> 3.3.0"
 end
 

Gemfile.lock

@@ -8,7 +8,7 @@ GEM
       tzinfo (~> 1.1)
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
-    ast (2.3.0)
+    ast (2.4.0)
     concurrent-ruby (1.0.5)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -51,8 +51,8 @@ GEM
     opus-ruby (1.0.1)
       ffi
     parallel (1.12.1)
-    parser (2.4.0.2)
-      ast (~> 2.3)
+    parser (2.5.0.4)
+      ast (~> 2.4.0)
     powerpack (0.1.1)
     prius (2.0.0)
     public_suffix (3.0.1)
@@ -79,9 +79,9 @@ GEM
     rspec-support (3.7.0)
     rspec_junit_formatter (0.3.0)
       rspec-core (>= 2, < 4, != 2.12.0)
-    rubocop (0.52.1)
+    rubocop (0.54.0)
       parallel (~> 1.10)
-      parser (>= 2.4.0.2, < 3.0)
+      parser (>= 2.5)
       powerpack (~> 0.1)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
@@ -125,7 +125,7 @@ DEPENDENCIES
   rake
   rspec (~> 3.7.0)
   rspec_junit_formatter (= 0.3.0)
-  rubocop (~> 0.52.1)
+  rubocop (~> 0.54.0)
   rufus-scheduler (~> 3.4.2)
   sentry-raven (~> 2.7.2)
   songkick-transport (~> 1.11.0)