Added adafruit-circuitpython-typing to setup.py

Author: tekktrik

setup.py

@@ -33,7 +33,10 @@
     # Author details
     author="Adafruit Industries",
     author_email="circuitpython@adafruit.com",
-    install_requires=["Adafruit-Blinka"],
+    install_requires=[
+        "Adafruit-Blinka",
+        "adafruit-circuitpython-typing",
+    ],
     # Choose your license
     license="MIT",
     # See https://pypi.python.org/pypi?%3Aaction=list_classifiers