Update yapf to latest version.

Bug: None
Change-Id: I77a994105e8ef16dcaf61402523d4cf9a1e39722
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3237590
Commit-Queue: Chris McDonald <cjmcdonald@chromium.org>
Auto-Submit: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Josip Sokcevic <sokcevic@google.com>