deps: update various dependencies

[westy92]

Fixes a vulnerability:

https://snyk.io/test/npm/chrome-launcher/0.13.0

Introduced through: chrome-launcher@0.13.0 › mkdirp@0.5.1 › minimist@0.0.8

[googlebot]

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[googlebot]

CLAs look good, thanks!

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[j-pendlebury]

any idea when this might get released?