Bump rubocop

Gemfile

@@ -253,7 +253,7 @@ group :development do
   gem "pronto-haml",    "0.9.0", require: false
   gem "pronto-rubocop", "0.9.1", require: false
   gem "pronto-scss",    "0.9.1", require: false
-  gem "rubocop",        "0.54.0", require: false
+  gem "rubocop",        "0.60.0", require: false
 
   # Preloading environment
 

Gemfile.lock

@@ -316,6 +316,7 @@ GEM
       i18n-inflector (~> 2.6)
       railties (>= 3.0.0)
     ipaddress (0.8.3)
+    jaro_winkler (1.5.1)
     jasmine (3.1.0)
       jasmine-core (= 3.1.0)
       phantomjs
@@ -609,13 +610,14 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
-    rubocop (0.54.0)
+    rubocop (0.60.0)
+      jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
-      parser (>= 2.5)
+      parser (>= 2.5, != 2.5.1.1)
       powerpack (~> 0.1)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
+      unicode-display_width (~> 1.4.0)
     ruby-oembed (0.12.0)
     ruby-progressbar (1.10.0)
     ruby_dep (1.5.0)
@@ -871,7 +873,7 @@ DEPENDENCIES
   responders (= 2.4.0)
   rspec-json_expectations (~> 2.1)
   rspec-rails (= 3.7.2)
-  rubocop (= 0.54.0)
+  rubocop (= 0.60.0)
   ruby-oembed (= 0.12.0)
   rubyzip (= 1.2.2)
   sass-rails (= 5.0.7)