Captures before keyrelease

Currently, manually running hkd will result in the enter key being held. The keyboard is grabbed before the release event is sent.

Temporary workaround:
```
sleep 1 && hkd -d /dev/input/by-id/<device1>,/dev/input/by-id/<device2>,...
```
The sleep command will wait a second before running the command, after the key release event has been sent.