Register a strategy for `libcst.MatchSingleton`

0-wiz-0

I've packaged hypothesmith 0.2.0 and ran the self tests, and I got: ``` _____________________________________________________________________ test_source_code_from_libcst_node_type[MatchSingleton] _____________________________________________________________________ tests/test_cst.py:23: in test_source_code_from_libcst_node_type @given(data=st.data()) E hypothesis.errors.Unsatisfiable: Unable to satisfy assumptions of test_source_code_from_libcst_node_type ------------------------------------------------------------------------------------------- Hypothesis ------------------------------------------------------------------------------------------- You can add @seed(77441592302281572436730079892928709310) to this test or run pytest with --hypothesis-seed=77441592302281572436730079892928709310 to reproduce this failure. ``` The installed dependencies are libcst-0.4.1, lark-parser-0.12.0, and hypothesis 6.36.1, with python 3.10.2; on NetBSD/amd64 in case it matters.

Zac-HD

Thanks for reporting this - Hypothesmith doesn't have more-than-accidental support for the new grammar features in Python 3.10, and it looks like we'll need it in this case. No timeline on that for a hobby project, but it would be entirely appropriate to skip this test until it's fixed.

Zac-HD

Fixed by #24 🐌