Cannot import alpaca-backtrader-api (Python 3.9.9 MacOS)

```
[~] python3
Python 3.9.9 (main, Nov 21 2021, 03:16:13)
[Clang 13.0.0 (clang-1300.0.29.3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import alpaca_backtrader_api
Traceback (most recent call last):
File "", line 1, in
File "/opt/homebrew/lib/python3.9/site-packages/alpaca_backtrader_api/__init__.py", line 1, in
from .alpacastore import AlpacaStore
File "/opt/homebrew/lib/python3.9/site-packages/alpaca_backtrader_api/alpacastore.py", line 12, in
import trading_calendars
File "/opt/homebrew/lib/python3.9/site-packages/trading_calendars/__init__.py", line 16, in
from .trading_calendar import TradingCalendar
File "/opt/homebrew/lib/python3.9/site-packages/trading_calendars/trading_calendar.py", line 33, in
from .calendar_helpers import (
File "/opt/homebrew/lib/python3.9/site-packages/trading_calendars/calendar_helpers.py", line 6, in
NP_NAT = np.array([pd.NaT], dtype=np.int64)[0]
TypeError: int() argument must be a string, a bytes-like object or a number, not 'NaTType'
>>>
```

Installed via `pip3 install alpaca-backtrader-api`