pin SQLAlchemy to <2.0

[xquyvu]

I'm getting this warning when having aim installed.

E sqlalchemy.exc.MovedIn20Warning: Deprecated API features detected! These feature(s) are not compatible with SQLAlchemy 2.0. To prevent incompatible upgrades prior to updating applications, ensure requirements files are pinned to "sqlalchemy<2.0". Set environment variable SQLALCHEMY_WARN_20=1 to show all deprecation warnings. Set environment variable SQLALCHEMY_SILENCE_UBER_WARNING=1 to silence this message. (Background on SQLAlchemy 2.0 at: https://sqlalche.me/e/b8d9)

Although there's an open issue for SQLAlchemy 2.0 support: #2514, it doesn't look like it's being prioritised. In the mean time, let's pin the dependency to silence this warning.

In the short term, my team's configuration treats DeprecationWarnings as Error, which means I cannot run any tests with VSCode testing when having aim installed.

Thanks!

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[mihran113]

Hey @xquyvu! Thanks a lot for the PR and sorry for late response. As we've already addressed the #2514 issue, I'm going to close this PR.