[Devtools] Roll Lighthouse to v5.4.0

https://github.com/GoogleChrome/lighthouse/commits/dt-540

Bug: 772558
Change-Id: Ia449be8c1464e9456a9a23d9d4dd158af4a0850f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1820064
Commit-Queue: Paul Irish <paulirish@chromium.org>
Reviewed-by: Paul Irish <paulirish@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700554}
7 files changed