Bug in adafruit_hid since library update

Test script can be found here: https://github.com/dbisu/pico-ducky/blob/main/duckyinpython.py

Line 6: 'from adafruit_hid.keyboard import Keyboard'

```
Traceback (most recent call last):
  File "code.py", line 6, in <module>
  File "adafruit_hid/__init__.py", line 21, in <module>
ImportError: no module named '__future__'
```