Log Message:
(math/R-mvtnorm) Updated 1.2.5 to 1.3.1

Changes in Version 1.3-1 (2024-09-02):

  Bugfixes:

         * Challenging numeric test of score function at ML estimate
           failed on Mac M1.

Changes in Version 1.2-6 (2024-08-17):

  Features:

         * Add 'logdet()' function for computing log-determinants from
           lower triangular matrices.

         * Speed up 'solve(<ltMatrices>, ...)'.

  Bugfixes:

         * Avoid unnecessary copying of large data objects.

         * -1/2 -> -1 for det(C) in lmvnorm_src vignette; spotted by
           Kurt Hornik

         * Use 'M\_PI'.