add magtag to init

Author: FoamyGuy

adafruit_pybadger/__init__.py

@@ -37,3 +37,5 @@
     from .pyportal import pyportal as pybadger
 elif "Circuit Playground Bluefruit" in os.uname().machine:
     from .cpb_gizmo import cpb_gizmo as pybadger
+elif "MagTag with ESP32S2" in os.uname().machine:
+    from .mag_tag import mag_tag as pybadger