[infra] Update go to 1.13.5

Change-Id: I318e1a4d0cad258489ff25595cfc28b619317aac
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/259805
Reviewed-by: Ben Wagner aka dogben <benjaminwagner@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
5 files changed