[Feature Request] support for unicode letters

[aMOPel]

Current Behaviour

áaaa 
üuuu
ñnnn

use gaa on each line to capitalize the word results in:

Aaa 
Uuu
Nnn

Requested Behaviour

Áaaa 
Üuuu
Ñnnn

Since this plugin is not catering exclusively to programming text cases, it would be nice to support unicode letters. gu/gU/~ in normal Vim are already able to convert the case of unicode letters. Maybe you can utilize those, or whatever function they are calling, to convert the case.

[johmsalas]

That's fair.. Not an expert on unicode. Is there some kind of pattern? For example, to cover all the letters, the plugin compares if the char is greater or equals to a and smaller or equals to z.

local is_previous_lower = previous_code >= codes.a and previous_code <= codes.z
local is_previous_upper = previous_code >= codes.A and previous_code <= codes.Z
local is_current_lower = current_code >= codes.a and current_code <= codes.z
local is_current_upper = current_code >= codes.A and current_code <= codes.Z

To get the codes I'm using LUA string.byte().

If there is that kind of patterns, and some way to identify if they are upper or lower, I can solve this feature. What I don't want is to degrade performance adding each possible char to a table (dict or array)