Merge pull request #3138 from alphagov/dependabot/bundler/puma-6.3.1 #544

Job	Run time
Integration tests	1m 39s
Lint JavaScript / Run Standardx	11s
Lint Ruby / Run RuboCop	29s
Lint SCSS / Run Stylelint	16s
Security Analysis / Run Brakeman	29s
Test Ruby / Run RSpec	1m 2s
Test JavaScript / Run Jasmine	1m 27s
	5m 33s

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