Update rubocop requirement from = 1.12.1 to = 1.13.0 (faker-ruby#2305)

Updates the requirements on [rubocop](https://github.com/rubocop/rubocop) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.12.1...v1.13.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

Gemfile.lock

@@ -17,7 +17,7 @@ GEM
     method_source (1.0.0)
     minitest (5.14.4)
     parallel (1.20.1)
-    parser (3.0.0.0)
+    parser (3.0.1.0)
       ast (~> 2.4.1)
     power_assert (2.0.0)
     pry (0.14.1)
@@ -26,8 +26,8 @@ GEM
     rainbow (3.0.0)
     rake (13.0.3)
     regexp_parser (2.1.1)
-    rexml (3.2.4)
-    rubocop (1.12.1)
+    rexml (3.2.5)
+    rubocop (1.13.0)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)
@@ -58,7 +58,7 @@ DEPENDENCIES
   minitest (= 5.14.4)
   pry (= 0.14.1)
   rake (= 13.0.3)
-  rubocop (= 1.12.1)
+  rubocop (= 1.13.0)
   simplecov (= 0.17.1, < 0.18)
   test-unit (= 3.4.0)
   timecop (= 0.9.4)

faker.gemspec

@@ -32,7 +32,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency('minitest', '5.14.4')
   spec.add_development_dependency('pry', '0.14.1')
   spec.add_development_dependency('rake', '13.0.3')
-  spec.add_development_dependency('rubocop', '1.12.1')
+  spec.add_development_dependency('rubocop', '1.13.0')
   # Workaround for cc-test-reporter with SimpleCov 0.18.
   # Stop upgrading SimpleCov until the following issue will be resolved.
   # https://github.com/codeclimate/test-reporter/issues/418