Import depth is too deep - max recursion stack traces being thrown on import

FeatherS2 running 7.0.0, using the 7.0.0 libraries

```python
>>> from adafruit_gc_iot_core import MQTT_API, Cloud_Core
Traceback (most recent call last):
File "", line 1, in
File "adafruit_gc_iot_core.py", line 32, in
File "adafruit_jwt.py", line 32, in
File "adafruit_rsa/__init__.py", line 16, in
File "adafruit_rsa/key.py", line 27, in
File "adafruit_rsa/prime.py", line 13, in
File "adafruit_rsa/randnum.py", line 12, in
File "adafruit_rsa/transform.py", line 14, in
File "adafruit_binascii.py", line 57, in
RuntimeError: maximum recursion depth exceeded
>>>
```

Reproduce the import shown in the issue on FeatherS2 with the listed 7.0.0 libraries, then trace the chain from adafruit_gc_iot_core.py through adafruit_jwt.py and the adafruit_rsa files to adafruit_binascii.py. Done means the import completes without RuntimeError: maximum recursion depth exceeded.

Written by the indexing model from the issue text.