ToCamelCase returns PascalCase

[LlewellynS96]

The first letter in camelCase should be lower case, e.g. httpServer. This is discussed in many places on the internet, including here.

This results in bugs in downstream packages like this one in sprig.

I believe the solution might be to remove one line and fix the tests.

xstrings/convert.go

Line 36 in 6ae33fe

r0 = unicode.ToUpper(r0)

[huandu]

Make sense. I'll add a new api ToPascalCase and change ToCamelCase behavior.