Merge pull request #3180 from alphagov/dependabot/npm_and_yarn/stylel… #1894

Job	Run time
Test Ruby	42s
Lint Ruby / Run RuboCop	13s
Lint JavaScript / Run Standardx	13s
Lint SCSS / Run Stylelint	17s
Security Analysis / Run Brakeman	8s
Test JavaScript / Run Jasmine	44s
	2m 17s

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