Update rake

[gavingmiller]

And puts some harder boundaries on what this project's requirements are.

Addresses: https://github.com/clio/inheritance_integer_type/security/dependabot/1

[clio-overlord]

Overlord detected package changes in this pull request. As the PR author, you are responsible for completing the checklist to ensure these packages are safe to use at Clio.

😎 17 packages automatically approved. You don't need to do anything here! Check the Playbook TLDR for more detail.

• activemodel @ 5.2.8.1 passed automated review
• activerecord @ 5.2.8.1 passed automated review
• activesupport @ 5.2.8.1 passed automated review
• coderay @ 1.1.3 approved at Clio
• concurrent-ruby @ 1.2.2 approved at Clio
• diff-lcs @ 1.5.0 approved at Clio
• i18n @ 1.14.1 approved at Clio
• method_source @ 1.0.0 approved at Clio
• minitest @ 5.20.0 approved at Clio
• pry @ 0.14.2 approved at Clio
• rake @ 13.1.0 approved at Clio
• rspec @ 3.12.0 approved at Clio
• rspec-core @ 3.12.2 approved at Clio
• rspec-expectations @ 3.12.3 approved at Clio
• rspec-mocks @ 3.12.6 approved at Clio
• rspec-support @ 3.12.1 approved at Clio
• tzinfo @ 1.2.11 approved at Clio

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