Update version number to 5.8.1

13 jobs for release
Status Job ID Name Coverage
  External
passed cdash-commit

failed paraview@release-dres-osx-shared-release+gui+python2

08:23:17

passed paraview@release-luigi-linux-shared-release+gui+mpi+python2

01:41:10

passed paraview@release-nemesis-windows-shared-release+gui+kits+mpi+python2

01:43:04

passed paraview@release-nemesis-windows-shared-release+gui+mpi

01:24:26

failed paraview@release-taanab-linux-shared-release+adios2+icc+mpi+python2

00:00:07

passed paraview@release-taanab-linux-static-release+adios2+mpi+offscreen+osmesa+python2

00:21:13

passed paraview@release-tylo-windows-shared-release+gui+python3+qtmin+tbb

01:41:32

passed paraview@release-tylo-windows-shared-release+gui+python3+tbb

01:41:04

failed paraview@release-vall-linux-shared-debug+adios2+extdeps+gui+mpi+python3

01:33:45

failed paraview@release-vall-linux-shared-release+adios2+doc+extdeps+gui+mpi+python3

01:21:11

passed cdash-commit

failed paraview@release-tylo-windows-shared-release+gui+python3+tbb

00:25:08