feat(fscache): add umask for file and dir permission control - #37
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Firstly, thank you very much for this very nice library!
I'm using this library for a per-user cache in chezmoi. I'd like to ensure that all files and directories created by the
fscachestore are only readable by the user who owns that cache.This PR adds a
fscache.WithUmask/?umask=option tofscachethat allows the application to exclude permissions from files and directories created byfscache. For example,fscache.WithUmask(0o077)will ensure that the created files and directories never have group or world read/write/execute permissions.