Log Message:
py-alembic: updated to 0.9.9:

0.9.9:
feature
Added new flag --indicate-current to the alembic history command. When listing \ 
versions, it will include the token “(current)” to indicate the given \ 
version is a current head in the target database.

bug
The fix for 455 in version 0.9.6 involving MySQL server default comparison was \ 
entirely non functional, as the test itself was also broken and didn’t reveal \ 
that it wasn’t working. The regular expression to compare server default \ 
values like CURRENT_TIMESTAMP to current_timestamp() is repaired.
Fixed bug where MySQL server default comparisons were basically not working at \ 
all due to incorrect regexp added in 455. Also accommodates for MariaDB 10.2 \ 
quoting differences in reporting integer based server defaults.
Fixed bug in op.drop_constraint() for MySQL where quoting rules would not be \ 
applied to the constraint name.