Bump rubocop from 0.47.1 to 0.48.1

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.47.1 to 0.48.1.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v0.47.1...v0.48.1)

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

Gemfile

@@ -16,7 +16,7 @@ group :development, :test do
   gem 'pry', '~> 0.10'
   gem 'pry-byebug', '~> 3.3'
   gem 'rspec-rails', '~> 3.5'
-  gem 'rubocop', '~> 0.46'
+  gem 'rubocop', '~> 0.48'
 end
 
 group :development do

Gemfile.lock

@@ -44,7 +44,7 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     arel (7.1.4)
-    ast (2.3.0)
+    ast (2.4.0)
     bcrypt (3.1.11)
     builder (3.2.3)
     byebug (9.0.6)
@@ -83,10 +83,10 @@ GEM
     nio4r (1.2.1)
     nokogiri (1.7.0.1)
       mini_portile2 (~> 2.1.0)
-    parser (2.3.3.1)
-      ast (~> 2.2)
+    parser (2.7.0.4)
+      ast (~> 2.4.0)
     pg (0.19.0)
-    powerpack (0.1.1)
+    powerpack (0.1.2)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
@@ -129,7 +129,8 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rainbow (2.2.1)
+    rainbow (2.2.2)
+      rake
     rake (13.0.1)
     rb-fsevent (0.9.8)
     rb-inotify (0.9.8)
@@ -151,13 +152,13 @@ GEM
       rspec-mocks (~> 3.5.0)
       rspec-support (~> 3.5.0)
     rspec-support (3.5.0)
-    rubocop (0.47.1)
+    rubocop (0.48.1)
       parser (>= 2.3.3.1, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-progressbar (1.8.1)
+    ruby-progressbar (1.10.1)
     slop (3.6.0)
     spring (1.7.2)
     spring-commands-rspec (1.0.4)
@@ -173,7 +174,7 @@ GEM
     thread_safe (0.3.5)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    unicode-display_width (1.1.3)
+    unicode-display_width (1.7.0)
     websocket-driver (0.6.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.2)
@@ -196,7 +197,7 @@ DEPENDENCIES
   rails (~> 5.0.1)
   rails_12factor (~> 0.0.3)
   rspec-rails (~> 3.5)
-  rubocop (~> 0.46)
+  rubocop (~> 0.48)
   spring (~> 1.6)
   spring-commands-rspec (~> 1.0)