Update entropy validator

[babenek]

as is:

"entropy_validation": {
    "iterator": "BASE64STDPAD_CHARS",
    "entropy": 5.497849750697005,
    "valid": true
}

to be:

"entropy_validation": {
    "entropy": 5.703055,
    "charset": ["BASE64STDPAD_CHARS", BASE32STDPAD_CHARS , ansi ...]
}

reason:
Current entropy is calculated with an iterator. It is quickly, but weak for analysis.
e.g.
eyJsldj.sd5nkv - a JWT but . is not a symbol of BASE64
eyJsldjsd5nkv - the same entropy and all symbols are from BASE64

easiest to be:

"entropy": 5.703055,