Recommended SQLAlchemy version for Cockroachdb v2.1 upgrade

Planning to upgrade Cockroachdb cluster from 2.0.4 to 2.1.3. Release notes recommends cockroachdb-python adapter to be upgraded to the latest release(0.2.1). Is it also necessary to bump up the SQLAlchemy version from 1.1 to latest? I see for the cockroachdb adapter testing, SQLAlchemy has been bumped up from 1.1 to 1.2.10.

SQLAlchemy 1.2 will work, and we have found that some later version of SQLAlchemy may not work properly. (We have not tested further yet.)