[canvaskit] Update npm to 0.19.0

This pushes the big name changes.

Change-Id: I8e2ab1707dc2e78cf03173d96d42691b703c7038
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/323887
Reviewed-by: Kevin Lubick <kjlubick@google.com>
3 files changed