radix conversion
- default alphabet is
'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_'
for input and output - you can change it by passing different alphabets to the
BaseConv
exported function - no IEEE-754 limitation
usage:
const conv = default; // '2a' // '2a' // '8de2991df40ff783057818d0012f3bc1c...'