Update VirtualKeyboard.java

[PedroGM80]

In the code I have added capital letters to the keyboard which extends its functionality.

[PedroGM80]

I add upercase keys

[wcmjunior]

Hey @PedroGM80. Thanks for your PR and sorry for the late response. I should (and will) pay more attention to my public repos. :-)

Anyway, if I do remember correctly, I decided not to add explicit capitalized letters as keys are already capitalized if shift or caps lock are active. See: https://github.com/PedroGM80/virtualkeyboard/blob/master/src/main/java/wcmjunior/virtualkeyboard/VirtualKeyboard.java#L330

Also, I see that you added VK_DEAD_CEDILLA, likely because you need a keyboard in Spanish. I think the right thing we should do here is to provide an easy way for users to change the keyboard configuration outside of the code itself. Maybe through a JSON file, for example. Then the user that instantiates a new Keyboard class would only provide the key configuration necessary for the target keyboard. This would definitively be much easier then forking the repo. LMK your thoughts. :-)