v0.3.20

What's Changed

• chore(py): fix vcr test issue by @baskaryan in #1610
• Simplify traceback by @hinthornw in #1611
• fix(python): Properly respect max_concurrency for aevaluate by @jacoblee93 in #1613
• fix(py): serialize langchain objects in testing.log_outputs, fix rich display table [LS-3237] by @baskaryan in #1609
• release(py): 0.3.20 by @jacoblee93 in #1621

Full Changelog: v0.3.19...v0.3.20