Bump to version 0.3.1

nettle.cabal

@@ -1,5 +1,6 @@
+Cabal-Version:       3.4
 Name:                nettle
-Version:             0.3.0
+Version:             0.3.1
 Synopsis:            safe nettle binding
 Description:
   safe binding for the nettle (<http://www.lysator.liu.se/~nisse/nettle/nettle.html>) library.
@@ -8,12 +9,11 @@ License:             MIT
 License-file:        COPYING
 Copyright:           Stefan Bühler <stbuehler@web.de>
 Author:              Stefan Bühler <stbuehler@web.de>
-Maintainer:          Stefan Bühler <stbuehler@web.de>
+Maintainer:          Clint Adams <clint@debian.org>
 Category:            Cryptography
 Build-Type:          Simple
 Homepage:            https://github.com/stbuehler/haskell-nettle
 Bug-reports:         https://github.com/stbuehler/haskell-nettle/issues
-Cabal-Version:       >=1.8
 Extra-source-files:  README.md
                    , src/nettle-ciphers.h
                    , src/nettle-hash.h