AMDmi3
With libcst 0.3.23, hypothesmith 0.2.1: ``` tests/test_cst.py:12: in <module> import hypothesmith /usr/local/lib/python3.9/site-packages/hypothesmith/__init__.py:3: in <module> from hypothesmith.cst import from_node /usr/local/lib/python3.9/site-packages/hypothesmith/cst.py:100: in <module> libcst.MatchSingleton, E AttributeError: module 'libcst' has no attribute 'MatchSingleton' ``` It looks like the newer version is required and the version requirement should be updated.