Dependency graph viewer README: check node version and update if needed

Bug: 1093962
Change-Id: Ic19ea0b07ac9cd20f361f2a39048a55e78533910
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2297713
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#788415}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 788a4628e1fecc8cdb840d312d86a24f1b533201
1 file changed