Update rake requirement from ~> 10.0 to ~> 13.0 (#4)

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@v10.5.0...v13.0.1)

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

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

Gemfile.lock

@@ -59,7 +59,7 @@ GEM
  websocket (~> 1.0)
  rainbow (2.2.2)
  rake
- rake (10.5.0)
+ rake (13.0.1)
  rspec (3.4.0)
  rspec-core (~> 3.4.0)
  rspec-expectations (~> 3.4.0)
@@ -104,7 +104,7 @@ PLATFORMS
 
 DEPENDENCIES
  bundler (~> 1.11)
- rake (~> 10.0)
+ rake (~> 13.0)
  rspec (~> 3.0)
  rubocop
  travis (~> 1.8, >= 1.8.2)

uuidable.gemspec

@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
  spec.require_paths = ['lib']
 
  spec.add_development_dependency 'bundler', '~> 1.11'
- spec.add_development_dependency 'rake', '~> 10.0'
+ spec.add_development_dependency 'rake', '~> 13.0'
  spec.add_development_dependency 'rspec', '~> 3.0'
  spec.add_development_dependency 'travis', '~> 1.8', '>= 1.8.2'