Merge pull request #328 from schmouk/release-2-1-3

Release 2 1 3 -> Main

Merge branch 'main' of https://github.com/schmouk/CppRandLib

#318-exclude documentation form language stats

Modified name of documentation directory in `README.md`.

Merge pull request #309 from schmouk/release-2-1

#308-Fix documentation

Merge pull request #307 from schmouk/release-2-1

Release 2-1

Merge pull request #290 from schmouk/schmouk-patch-1

Update README.md

Merge pull request #289 from schmouk/release-2-0

Release 2.0
Added in README.md the link to CppRandLib Github web pages.

Merge pull request #66 from schmouk/dev-cpp20

Dev cpp20