Cursor update
Greetings. I've been trying to create a text editor with illwill. However, it seems that I am unable to see the cursor position change when changing it with the `setCursorPos()` proc. Also, I couldn't find any proc to delete a char kind of like the one that exists in ncurses.h `delch()`. In addition, would it be possible to get the characters from a set location such as with a proc that accepts the location and returns a char or a string? Thank you!