Merge pull request #85 from tekktrik/hotfix/require-python-version

Require Python version >= 3.7.0

Author: dhalbert

setup.py

@@ -34,7 +34,8 @@
     # Author details
     author="Adafruit Industries",
     author_email="circuitpython@adafruit.com",
-    install_requires=["Adafruit-Blinka>=6.20.4", "adafruit-circuitpython-typing"],
+    python_requires=">=3.7.0",
+    install_requires=["Adafruit-Blinka>=7.0.0", "adafruit-circuitpython-typing"],
     # Choose your license
     license="MIT",
     # See https://pypi.python.org/pypi?%3Aaction=list_classifiers