KeyError on postgresql_include

[sbronson]

Like #513, but for PostgreSQL. Porting e01041b worked for me.

[CaselIT]

Thanks for reporting.

If you can open a pr with the porting you done we can merge it. Thanks

[Robak23]

Do you know in which version will it be included? Is there some workaround for now?

[zzzeek]

hopefully 1.7.0

[sqla-tester]

Steven Bronson has proposed a fix for this issue in the master branch:

Fix postgresql_include in create_index https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/3010