Changelog for argon2-1.2.0

1.2.0

Updated embedded phc-winner-argon2, so that hashes are generated using version 1.3 of the argon2 specification.

Note that that hashes generated using this version are different than hashes generated using previous versions, so anything that compares them or relies on them being stable may be broken by this update. However, Crypto.Argon2.verify will continue to be able to verify hashes produced by previous versions.
Use CSize for portability instead of Word64, fixing build on 32 bit systems. This changed the constructors of Argon2Exception, an API change.
Bug fix: Crypto.Argon2.hash returned a ByteString truncated at the first NULL.
Added use-system-library build flag.
Build against base-4.9

First stable release. Same API as 1.0.0, but now features documentation and expected type class instances for data types.
QuickCheck properties added:
1. verify (hashEncoded options password salt) password == True
2. hash options password salt /= password
hash now uses the underlying "raw" hash routines, rather than the encoded routines. This was a bug in 1.0.0. Thanks to @jorgen for this fix.
verify added, in order to correctly verify that a password matches an encoded password.
defaultHashOptions are now more expensive.