mountinfo v0.2.0

Bug fixes:

• Fix path unescaping for paths with double quotes (#16)

Improvements:

• Mounted: speed up by adding fast paths using openat2 (Linux-only, #29) and stat (#20)
• Mounted: relax path requirements (allow relative, non-cleaned paths, symlinks) (fixes #27)
• Unescape fstype and source fields (#16)
• Documentation improvements (#15)

Testing/CI:

• Unit tests: exclude darwin (#13)
• CI: run tests under Fedora 32 to test openat2 (#29)
• TestGetMounts: fix for Ubuntu build system (#18)
• Makefile: fix ignoring test failures (#19)
• CI: add cross build (#23)

Thanks to:

• Aleksa Sarai
• Shengjing Zhu