Log Message:
arpack-ng: updated to 3.9.1

arpack-ng - 3.9.1
* pyarpack: Ensure that the matrix properties (symmetric/hermitian) fit the \ 
solver (CG/LDL) with which they are used in the tests
* [BUG FIX] Tests for PARPACK with C/C++ bindings icb_parpack_c and \ 
icb_parpack_cpp are now really parallel and split the problem across MPI \ 
processes.
* Update arpackmm test suite: enable solving non-symmetric tests with BiCG solver
* README: Add details on Windows installation.
* [BUG FIX] Ensure that LAPACK RNG state is propagated (regression in 3.9.0).
* [BUG FIX] Ensure that separate random seeds are used on different parallel \ 
thread in D and S versions of functions (issue from original ARPACK).
* ICB(arpackdef.h): distinct intel llvm compiler (icx with clang-cl) from msvc \ 
on windows
* ICB(arpackdef.h): Undef macro I if complex.h from msvc version is loaded, \ 
which is an usual name and causes issues on arpackSolver.
* [BUG FIX] Fix install: headers in /path/to/local/include/arpack for ICB samples
* [BUG FIX] Fix install: headers in /path/to/local/include/arpack
* arpackmm: allow for using LA/SA magnitudes.
* Rename icbexmm option into eigen option.
* README: document how to use ICB.
* [BUG FIX] arpackmm: fix restart.
* README: document where to find arpack user's guide.