Please make Weak option truly weak (1 instead of 3)

```
        case HTKHapticFeedbackTypeWeak:
            return 1;
```

Here:

https://github.com/niw/HapticKey/blob/9181b97c2ad382c4da33f717f68371b100f154c6/HapticKey/Sources/HTKHapticFeedback.m#L121

(Or add more options)

Thank you!