⬆️ Bump cython from 0.29.18 to 0.29.20

[dependabot-preview]

Bumps cython from 0.29.18 to 0.29.20.

Changelog

Sourced from cython's changelog.

0.29.20 (2020-06-10)

Bugs fixed

• Nested try-except statements with multiple return statements could crash due to incorrect deletion of the except as target variable. (Github issue #3666)
• The @classmethod decorator no longer rejects unknown input from other decorators. Patch by David Woods. (Github issue #3660)
• Fused types could leak into unrelated usages. Patch by David Woods. (Github issue #3642)
• Now uses Py_SET_SIZE() and Py_SET_REFCNT() in Py3.9+ to avoid low-level write access to these object fields. Patch by Victor Stinner. (Github issue #3639)
• The built-in abs() function could lead to undefined behaviour when used on the negative-most value of a signed C integer type. Patch by Serge Guelton. (Github issue #1911)
• Usages of sizeof() and typeid() on uninitialised variables no longer produce a warning. Patch by Celelibi. (Github issue #3575)
• The C++ typeid() function was allowed in C mode. Patch by Celelibi. (Github issue #3637)
• The error position reported for errors found in f-strings was misleading. (Github issue #3674)
• The new c_api_binop_methods directive was added for forward compatibility, but can only be set to True (the current default value). It can be disabled in Cython 3.0.

0.29.19 (2020-05-20)

Bugs fixed

• A typo in Windows specific code in 0.29.18 was fixed that broke "libc.math". (Github issue #3622)
• A platform specific test failure in 0.29.18 was fixed. Patch by smutch. (Github issue #3620)

Commits

• 9bc3fc6 Prepare release of 0.29.20.
• 5d42ec8 Allow selecting specific doctests in test modules with "-k pattern", instead ...
• 743365a Correct the positions reported for errors in f-strings.
• 4728b8a Fix test in Py2.
• bbef4d7 Return statements inside of nested try-except statements lead to an incorrect...
• 09979e1 Simplify classmethod() code in Py3 where "PyMethodDescr_Type" is directly ava...
• 8359cf7 Avoid distracting GIL error after failed function lookups.
• 43b30e3 Update changelog.
• 7604895 classmethod() should fall back to calling PyClassMethod_New() instead of deci...
• 7a64698 Use variable to aboid compiler warning
• Additional commits viewable in compare view

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