Notify user when caps lock is on

[PappasBrent]

It would be a nice quality of life feature for Ngram Type to notify the user when they have caps lock on, like how monkeytype does.
I sometimes press the caps lock button on accident when trying to press the tab key, and don't realize it until I start to type and my letters come out in all caps.
This forces me to restart my current challenge again, which is somewhat annoying.
This could be avoided if Ngram Type were to notify users when they have caps lock active.