regex: upgraded package to upstream

Upgraded dev-python/regex to version 2021.4.4 on amd64

Note: This package is compatible with Python 3.6, but upstream gentoo
package does not reflect that.  Updated PYTHON_COMPAT accordingly.

BUG=b:192389533
TEST=emerge and import package

Change-Id: I595fc366ff30666d86727c02021ca1bddae36e54
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3003925
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Auto-Submit: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
5 files changed