Update rake requirement from ~> 13.0.6 to ~> 13.1.0 (#35)

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@v13.0.6...v13.1.0)

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

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

Gemfile

@@ -4,7 +4,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'rake', '~> 13.0.6'
+gem 'rake', '~> 13.1.0'
 gem 'rspec', '~> 3.7'
 gem 'rubocop-rspec', '~> 2.0'
 gem 'sequel', '~> 5.47'