imagesize: upgraded package to upstream

Upgraded dev-python/imagesize to version 1.1.0 on amd64, arm

It's needed by sphinx.

BUG=chromium:999876
TEST=update_chroot

Change-Id: I50c4bdfd6380724c792e4c2cefef82045f80477d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2219762
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Yilin Yang (kerker) <kerker@chromium.org>
Tested-by: Yilin Yang (kerker) <kerker@chromium.org>
4 files changed