fix: `Directory.EnumerateDirectories` with trailing slash in `path`#415

vbreuss merged 3 commits intomainTestably/Testably.Abstractions:mainfrom

topic/vb/test-enumeratedirectories-with-trailing-slashTestably/Testably.Abstractions:topic/vb/test-enumeratedirectories-with-trailing-slashCopy head branch name to clipboard