[eigen] Eigen 3.3.9 released today!

[David Tellenbach <david.tellenbach@xxxxxx>]

We are happy to announce that Eigen 3.3.9 has been released today!

This is a maintenance release fixing minor bugs and compilation issues. For more

details have a look at the changelog pasted below and on

  http://eigen.tuxfamily.org/index.php?title=ChangeLog#Eigen_3.3.9

The sources are available on GitLab:

  https://gitlab.com/libeigen/eigen/-/releases/3.3.9

Thanks to the community for making this possible.

Eigen 3.3.9 ChangeLog

---------------------

* Commit 4e5385c90: Introduce rendering Doxygen math formulas with MathJax and

                    the option EIGEN_DOC_USE_MATHJAX to control this.

* Issue 2036: Make sure the CMake function find_standard_math_library_test_program

              compiles and doesn't optimize away the function we try to test for.

* Issue 2046: Rename test/array.cpp to test/array_cwise.cpp fix an issue with the

              C++ standard library header "array"

* Issue 2040: Fix an issue in test/ctorleak that occured when disabling expections.

* Issue 2011: Remove error counting in OpenMP parallel section in Eigen's GEMM

              parallelizing logic.

* Issue 2012: Define coeff-wise binary array operators for base class to fix an

              issue when using Eigen with C++20.

* Commit bfdd4a990: Fix an issue with Intel® MKL PARDISO support.