Should use uppper case when encoding

[danny-cheung]

https://en.wikipedia.org/wiki/Base32#Crockford's_Base32 suggests that the encoded string should only use upper case characters.

[danny-cheung]

Not sure if this would be a breaking change.

[isoos]

I think that'd be a breaking change now, and for very little benefit. Maybe adding an extra method or a parameter to them?

[danny-cheung]

I disagree with the "very little benefit" part. By using lower case, the output is non-compliant and therefore incorrect.

[isoos]

I disagree with the "very little benefit" part. By using lower case, the output is non-compliant and therefore incorrect.

#7 would now break all the codes that rely on the lowercase ids that this code generates. I know at least two apps that use it such way, and their database is case sensitive.

If the code is only soft-compliant, I am willing to live with it.