Update rake requirement from ~> 13.1.0 to ~> 13.2.0

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@v13.1.0...v13.2.0)

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

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

dyck.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
   end
   s.require_paths = ['lib']
 
-  s.add_development_dependency 'rake', '~> 13.1.0'
+  s.add_development_dependency 'rake', '~> 13.2.0'
   s.add_development_dependency 'rspec', '~> 3.13.0'
   s.add_development_dependency 'rubocop', '~> 1.28.2'
   s.add_development_dependency 'rubocop-rake', '~> 0.6.0'