Edge Case: hold 4 2 6, release 4

[pauldps]

Steps to reproduce

• Hold 4
• Hold 2
• Hold 6
• Release 4

Expected Events

• 4
• 1 (4 + 2)
• 3 (2 + 6)
• No event

What is happening instead

The last event is being sent over twice, as if repeating the last input, when it's not the case.

Suggested Fix

The real directional event is always based on the last two inputs being held.

When a direction is released, do not dispatch any event if its index is not part of the two last items.