[am] Update serialize-javascript
[am] Update serialize-javascript

Fixes this issue: https://github.com/google/skia-buildbot/network/alert/am/package-lock.json/serialize-javascript/open
It could not be automatically fixed by dependabot because of conflicts.

Bug: skia:10995
Change-Id: Ibd859bc99fd56f66c9bc24b4b8a9809bfcde2493
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/340699
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot