Weird results when original string consists of all caps

[alidrus]

I'm trying to make some case conversions for certain types of sensors (e.g. pH sensor, TSS sensor etc).

I haven't covered all the different case types here but I think this is sufficient to indicate there is a fundamental problem with single-letter abbreviated words. For example, in the following code:

import { capitalCase, kebabCase, camelCase, pascalCase } from 'case-anything';

// From Camel Case
console.log(pascalCase('tSS'));
console.log(camelCase('tSS'));
console.log(capitalCase('tSS'));
console.log(kebabCase('tSS'));

// From Pascal Case
console.log(pascalCase('TSS'));
console.log(camelCase('TSS'));
console.log(capitalCase('TSS'));
console.log(kebabCase('TSS'));

Gives the following wrong results:

TSs
tSs
T Ss
t-ss
Tss
tss
Tss
tss

Which is different from the expected result which SHOULD be:

TSS
tSS
T S S
t-s-s
TSS
tSS
T S S
t-s-s

By the way the abbreviation "TSS" used here stands for "Total Suspended Solids". I am using "TSS" to shorten strings.

All that being said, this is a magnificent project and I hope this bug report will help improve it even further. Thanks in advance.