Update rake requirement from ~> 13.0.0 to ~> 13.1.0

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@v13.0.0...v13.1.0)

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

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

clocale.gemspec

@@ -32,7 +32,7 @@ Gem::Specification.new do |spec|
   end
 
   spec.add_development_dependency 'codecov', '~> 0.6.0'
-  spec.add_development_dependency 'rake', '~> 13.0.0'
+  spec.add_development_dependency 'rake', '~> 13.1.0'
   spec.add_development_dependency 'rake-compiler', '~> 1.2.0'
   spec.add_development_dependency 'rspec', '~> 3.12.0'
   spec.add_development_dependency 'rubocop', '~> 0.93.0'