Merge branch '487-catch2-version-too-old-for-build-on-fedora-35' into 'master'

Resolve "Catch2 version too old for build on Fedora 35"

Closes #481 und #487

See merge request !423

conanfile.txt

 [requires]
 spdlog/1.8.5
-catch2/2.13.3
+catch2/2.13.8
 eigen/3.3.8
 boost/1.76.0
 zlib/1.2.11