ENH: update package version to 13.1.0

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-webservice.

I've started a version update as instructed in #110.

I'm currently searching for new versions and will update this PR shortly if I find one! Thank you for waiting!

Fixes #110

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[traversaro]

Oh cool, compilation error that was not there in local CI:

2024-10-23T08:28:32.1623907Z $SRC_DIR/build/bindings/python/iDynTreePYTHON_wrap.cxx: In function 'PyObject* _wrap_MatrixDynSize_toNumPy(PyObject*, PyObject*)':
2024-10-23T08:28:32.1624664Z $SRC_DIR/build/bindings/python/iDynTreePYTHON_wrap.cxx:27620:41: error: too few arguments to function 'PyObject* SWIG_Python_AppendOutput(PyObject*, PyObject*, int)'
2024-10-23T08:28:32.1625180Z 27620 |     resultobj = SWIG_Python_AppendOutput(resultobj,obj);
2024-10-23T08:28:32.1625581Z       |                 ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~

perhaps a SWIG 4.3.0 problem?

[github-actions[bot]]

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[traversaro]

Pinning to SWIG 4.2.1 fix the problem, we need to replicate this in idyntree's CI and open an issue in swig.