message: Added exposed SHA3Hasher and NACL classes
diff: /*
  +import { SHA3Hasher } from './SHA3Hasher';
  * Copyright 2019 NEM
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  export * from './Crypto';
  export * from './KeyPair';
  +export * from './SHA3Hasher';
  +export * from './nacl_catapult';
  