v4.0.0

Breaking

• Always return boolean and Promise<boolean> outputs (#4): 9ce980f
  Previously, if a path did not exist, the async-version (premove) would return false synchronously.
  Now, the premove utility will always return a Promise<boolean> (or boolean for premove/sync) that reflects the path's original existence.

Chores

• Add benchmarks (#3): 7602c12
• Update module size: 3fd3009
• Bump dev-dependency versions: e3c5e65, b8ae1b6

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Full Changelog: v3.0.1...v4.0.0