[Libosinfo] [osinfo-db PATCH] tests: test_dates: work without datetime.date.fromisoformat()

[Fabiano Fidêncio]

On Tue, 2019-05-21 at 17:21 +0200, Pino Toscano wrote:
> datetime.date.fromisoformat() was introduced in Python 3.7, so
> provide
> an alternative implementation for it with older Python versions.
> 
> Fixes commit 5da3b8fdd836a55a58365718e93d0372fcc2bf0b.

Reviewed-by: Fabiano Fidêncio <fidencio at redhat.com>