This will allow us to use ts-node to execute tests written
in TypeScript.

Bug: v8:7327
Change-Id: I0804db1f112448350c5e91135242e6ec6706d231
Reviewed-on: https://chromium-review.googlesource.com/c/1274086
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56564}