Bump rubocop from 1.6.1 to 1.7.0 (#12043)

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 1.6.1 to 1.7.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop/compare/v1.6.1...v1.7.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -139,7 +139,7 @@ group :development, :test do
   gem "knapsack_pro", "~> 2.10.1" # Help parallelize Ruby spec builds
   gem "pry-byebug", "~> 3.8" # Combine 'pry' with 'byebug'. Adds 'step', 'next', 'finish', 'continue' and 'break' commands to control execution
   gem "rspec-rails", "~> 4.0" # rspec-rails is a testing framework for Rails 3+
-  gem "rubocop", "~> 1.6", require: false # Automatic Ruby code style checking tool
+  gem "rubocop", "~> 1.7", require: false # Automatic Ruby code style checking tool
   gem "rubocop-performance", "~> 1.9", require: false # A collection of RuboCop cops to check for performance optimizations in Ruby code
   gem "rubocop-rails", "~> 2.9", require: false # Automatic Rails code style checking tool
   gem "rubocop-rspec", "~> 2.1", require: false # Code style checking for RSpec files

Gemfile.lock

@@ -500,7 +500,7 @@ GEM
       rack
     orm_adapter (0.5.0)
     parallel (1.20.1)
-    parser (2.7.2.0)
+    parser (3.0.0.0)
       ast (~> 2.4.1)
     patron (0.13.3)
     pg (1.2.3)
@@ -639,7 +639,7 @@ GEM
     rspec-retry (0.6.2)
       rspec-core (> 3.3)
     rspec-support (3.9.3)
-    rubocop (1.6.1)
+    rubocop (1.7.0)
       parallel (~> 1.10)
       parser (>= 2.7.1.5)
       rainbow (>= 2.2.2, < 4.0)
@@ -934,7 +934,7 @@ DEPENDENCIES
   rouge (~> 3.26)
   rspec-rails (~> 4.0)
   rspec-retry (~> 0.6)
-  rubocop (~> 1.6)
+  rubocop (~> 1.7)
   rubocop-performance (~> 1.9)
   rubocop-rails (~> 2.9)
   rubocop-rspec (~> 2.1)