Time to time generated image and phrase have mismatched letter casing

[visula-kingdom360]

Captcha issue with case mismatch so had to use lowercase characters to continue.
Image generated from the captcha is this:

The phrase generated from the captcha is this:

As analyzed this occurred because of the uppercase '.ttf' file -> captcha2.ttf as it contains only Uppercase values, if possible please add a fix for this as soon as possible

[reccoder]

I fixed the issue, and created a pull request #126
Once request will be approved the issue will be fixed