Planting seeds v0.5.0

This release brings PASETO Version4 protocol implementation with Algorithm Lucidity. Version4 includes important features and changes from Version2 such as addition of implicit assertions and changes to hashing and salt use.

• implement Version4 encrypt() / decrypt() and sign() / verify()
• generate symmetric and asymmetric keys for use with Version4
• benchmarks for hash function implementations, naturally Version4 uses a performant hash function primitive
• deprecate use of Version2 class, all necessary primitives can be imported from version2 module directly, backwards compatibility layer is in place to allow existing code to run