build(deps-dev): update rake requirement from ~> 13.1.0 to ~> 13.2.1

Updates the requirements on [rake](https://github.com/ruby/rake) to permit the latest version.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](ruby/rake@v13.1.0...v13.2.1)

---
updated-dependencies:
- dependency-name: rake
  dependency-type: direct:development
...

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

puppeteer-ruby.gemspec

@@ -28,7 +28,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'chunky_png'
   spec.add_development_dependency 'dry-inflector'
   spec.add_development_dependency 'pry-byebug'
-  spec.add_development_dependency 'rake', '~> 13.1.0'
+  spec.add_development_dependency 'rake', '~> 13.2.1'
   spec.add_development_dependency 'rollbar'
   spec.add_development_dependency 'rspec', '~> 3.12.0'
   spec.add_development_dependency 'rspec_junit_formatter' # for CircleCI.