A simple random password generator

1. Defaults to 28 character password output
2. Accepts one argument of a number between 4-32
3. Input validation used

`python3 .\script.py`
Your 28-character password is: _9Z-PGnh_si,b,uKTH$9Sp!4F!_v
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`python3 .\script.py 22`
Your 22-character password is: sg!Y@9[/Xmnh@i/}Y$jqhm
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`python3 .\script.py 3`
Please enter a number between 4 and 32: 16
Your 16-character password is: W(NJqBMWY1ul-!vd
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