[jsfiddle] Default to canvaskit instead of pathkit
[jsfiddle] Default to canvaskit instead of pathkit

Change-Id: I3d0fdb9c550a7ee5956867bf9dd756455eb12d71
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/268618
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Commit-Queue: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@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