Bump rubocop from 1.38.0 to 1.39.0 (#443)

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.38.0 to 1.39.0.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.38.0...v1.39.0)

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

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

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

Gemfile

@@ -17,7 +17,7 @@ end
 group :test do
   gem "climate_control", "~> 1.2.0"
   gem "rspec", "~> 3.12.0"
-  gem "rubocop", "~> 1.38.0"
+  gem "rubocop", "~> 1.39.0"
   gem "rubocop-performance", "~> 1.15.0"
   gem "simplecov", "~> 0.21.2"
   gem "simplecov-console", "~> 0.9.1"

Gemfile.lock

@@ -105,7 +105,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.0)
-    rubocop (1.38.0)
+    rubocop (1.39.0)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.2.1)
@@ -173,7 +173,7 @@ DEPENDENCIES
   pry (~> 0.14.1)
   rake (~> 13.0.6)
   rspec (~> 3.12.0)
-  rubocop (~> 1.38.0)
+  rubocop (~> 1.39.0)
   rubocop-performance (~> 1.15.0)
   semver2 (~> 3.4)
   simplecov (~> 0.21.2)