Changes:
- Pull request #136, the Windows implementation used some unnecessary expensive shared pointer for resource management and these where replaced by a dedicated code.
- Fix for #132, pull request #135,
fs::remove_all
now just deletes symbolic links instead of following them. - Pull request #133, fix for
fs::space
where a numerical overflow could happen in a multiplication. - Replaced travis-ci.org with GitHub Workflow for the configurations: Ubuntu 20.04: GCC 9.3, Ubuntu 18.04: GCC 7.5, GCC 8.4, macOS 10.15: Xcode 12.4, Windows 10: Visual Studio 2019