SIGN IN SIGN UP

Update build badge in README.md (#2271)

This replaces the old Travis CI build badge with a GitHub Actions one.

Signed-off-by: Mike Ralphson <mike.ralphson@gmail.com>
M
Mike Ralphson committed
97ec145130e216fa8e59efc228c9211f439b202c
Parent: 53c50e1
Committed by GitHub <noreply@github.com> on 7/2/2020, 4:13:37 PM