python3-cython: upgrade 3.1.2 -> 3.1.3

python3-cython: upgrade 3.1.2 -> 3.1.3

Changelog:
==========
- Some method calls with 0 or 1 argument failed to use ``PyObject_VectorCallMethod()``.
- Walrus assignments of literal Python integers could generate invalid C code.
  (Github issue :issue:`6989`)
- ``cython.pythread_type_lock`` (also used as fallback for ``cython.pymutex``)
  could stall on heavily contended locks.
  (Github issue :issue:`6999`)
- C string arrays (not pointers) always coerced to the Python default string type,
  even on explicit casts to other string types.
  (Github issue :issue:`7020`)
- Unterminated ``\N{}`` character escapes in strings could unrail the parser.
  (Github issue :issue:`7056`)
- An internal C function was not marked as ``static`` and leaked a linker symbol.
  (Github issue :issue:`6957`)
- Some Unicode letters were not recognised as lexically valid name parts.
  (Github issue :issue:`7059`)
- Compatibility with PyPy3.8 was lost by accident.
- The Linux binary wheels of 3.1.2 used SSSE3 CPU instructions which are not available on some CPUs.
  (Github issue :issue:`7038`)

Signed-off-by: Liu Yiding <liuyd.fnst@fujitsu.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>