Description of changes: Update nix dependency to be optional, with the feature default enabled. This will allow non *nix systems to use this crate for its type definitions.
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Issue #, if available: 40
Description of changes: Update nix dependency to be optional, with the feature default enabled. This will allow non *nix systems to use this crate for its type definitions.
By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.