🐛 Improve modifier tap detection
🐛 Improve modifier tap detection

Prior to this change, simultaneously tapping option and another modifier
would sometimes enter Hyper Mode. With this change, we should only enter
Hyper Mode when this exact sequence occurs:

1. No modifiers are down
2. Only the Option key is down
3. No modifiers are down

jasonrudolph/keyboard,jasonrudolph/keyboard