Update rubocop to 0.81

Authored-by: Greg Cobb <gcobb@pivotal.io>

Author: Gerg

.rubocop.yml

@@ -306,3 +306,10 @@ Style/HashTransformKeys:
 
 Style/HashTransformValues:
   Enabled: true
+
+Lint/RaiseException:
+  Enabled: true
+
+Lint/StructNewOverride:
+  Enabled: true
+

Gemfile

@@ -88,7 +88,7 @@ group :test do
   gem 'rspec-rails', '~> 3.9.1'
   gem 'rspec-wait'
   gem 'rspec_api_documentation', '>= 6.1.0'
-  gem 'rubocop', '~> 0.80.1'
+  gem 'rubocop', '~> 0.81.0'
   gem 'timecop'
   gem 'webmock', '> 2.3.1'
 end

Gemfile.lock

@@ -394,14 +394,14 @@ GEM
       activesupport (>= 3.0.0)
       mustache (~> 1.0, >= 0.99.4)
       rspec (~> 3.0)
-    rubocop (0.80.1)
+    rubocop (0.81.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
       rexml
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 1.7)
+      unicode-display_width (>= 1.4.0, < 2.0)
     ruby-debug-ide (0.7.2)
       rake (>= 0.8.1)
     ruby-mysql (2.9.14)
@@ -478,7 +478,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.7)
-    unicode-display_width (1.6.1)
+    unicode-display_width (1.7.0)
     vhd (0.0.4)
       bit-struct
     vmstat (2.3.1)
@@ -563,7 +563,7 @@ DEPENDENCIES
   rspec-rails (~> 3.9.1)
   rspec-wait
   rspec_api_documentation (>= 6.1.0)
-  rubocop (~> 0.80.1)
+  rubocop (~> 0.81.0)
   ruby-debug-ide (>= 0.7.0.beta4)
   rubyzip (>= 1.3.0)
   scientist (~> 1.1.0)