Feature request: add option to make base32 padding optional

[benjreinhart]

Some third-party and/or standard libraries support optional padding when encoding and decoding.

User facing ids that look like the below are an eyesore.

> base32.encode(crypto.getRandomValues(new Uint8Array(16)))
'7CI63KSR5ANU3BKSLYUFTGYQPM======'

I'm wondering if you would be open to adding a {padding: false} option or doing something like #4 for base32 as well?

[paulmillr]

you can add it as base32nopad if you need it