feat: Add ability to control color of each character

[mheidarian]

No description provided.

[mbi]

Awesome, thank you! I just changed a tiny detail, i.e. the documentation of the CAPTCHA_LETTER_COLOR_FUNCT setting states that the second argument is the whole challenge string, when in reality you were only passing the current letter in the loop.

I changed it so that it actually does as mentioned in the documentation, which makes more sense since we're also passing the index. I imagine this was your original intention?

[mheidarian]

Awesome, thank you! I just changed a tiny detail, i.e. the documentation of the CAPTCHA_LETTER_COLOR_FUNCT setting states that the second argument is the whole challenge string, when in reality you were only passing the current letter in the loop.

I changed it so that it actually does as mentioned in the documentation, which makes more sense since we're also passing the index. I imagine this was your original intention?

Yes, that was indeed my original intention. Thank you for catching and correcting it! I appreciate your attention to detail.