v2.0.0

Breaking

• Support for callbacks has been removed in favour of promises.

Replacement:

-sha1File("file.txt", (error, hash) => {...})
+sha1File("file.txt").then(hash => {...}).catch(error => {...})

• Synchronous functionality has been moved to a different function.

Replacement:

-sha1File("file.txt")
+sha1File.sync("file.txt")

• Node.js 10 or later is now required.