sqlalchemy security fix available for testing

[Sylvain Beucler <beuc@beuc.net>]

Hi,

I made a fix for sqlalchemy available for testing (CVE-2019-7164/7548):
https://people.debian.org/~beuc/lts/sqlalchemy/

Upstream author Mike Bayer warns that this might break applications,
hence if you are depend on sqlalchemy you are encouraged to test:
https://gerrit.sqlalchemy.org/#/c/sqlalchemy/sqlalchemy/+/1165/

I'll update it if upstream makes more fine-tuning.
I plan to push it next week unless users/testers report breakage.

Cheers!
Sylvain