Bump rubocop from 1.50.2 to 1.51.0

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.50.2 to 1.51.0.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.50.2...v1.51.0)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile

@@ -13,6 +13,6 @@ group :test do
   gem 'pry'
   gem 'rb-readline'
   gem 'rspec', '~> 3.12.0'
-  gem 'rubocop', '~> 1.50'
+  gem 'rubocop', '~> 1.51'
   gem 'webmock', '~> 3.13'
 end

Gemfile.lock

@@ -46,8 +46,8 @@ GEM
     json (2.6.3)
     method_source (1.0.0)
     multipart-post (2.3.0)
-    parallel (1.22.1)
-    parser (3.2.2.0)
+    parallel (1.23.0)
+    parser (3.2.2.1)
       ast (~> 2.4.1)
     pry (0.14.2)
       coderay (~> 1.1)
@@ -56,7 +56,7 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     rb-readline (0.5.5)
-    regexp_parser (2.7.0)
+    regexp_parser (2.8.0)
     rexml (3.2.5)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
@@ -71,7 +71,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.0)
-    rubocop (1.50.2)
+    rubocop (1.51.0)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.2.0.0)
@@ -81,7 +81,7 @@ GEM
       rubocop-ast (>= 1.28.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.28.0)
+    rubocop-ast (1.28.1)
       parser (>= 3.2.1.0)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
@@ -107,7 +107,7 @@ DEPENDENCIES
   rake
   rb-readline
   rspec (~> 3.12.0)
-  rubocop (~> 1.50)
+  rubocop (~> 1.51)
   simplecov (~> 0.22.0)
   simplecov-html (~> 0.12.3)
   simplecov-lcov (~> 0.8.0)