An implementation of FNV1a following the source: https://www.isthe.com/chongo/tech/comp/fnv/index.html

The function FNV1a takes two arguments

1. str: an string to be hashed
2. size: an string indicating size (valid inputs: '32bit', '64bit', '128bit')

• start with basic implementation
• make the function self-contained
• add some tests
• convert to an usable npm package (may be)