Update setup.py

Author: kattni

setup.py

@@ -34,7 +34,7 @@
     # Author details
     author="Adafruit Industries & Damien P. George",
     author_email="circuitpython@adafruit.com",
-    install_requires=["Adafruit-Blinka", "adafruit-circuitpython-pypixelbuf>=2.0.0"],
+    install_requires=["Adafruit-Blinka", "adafruit-circuitpython-pixelbuf"],
     # Choose your license
     license="MIT",
     # See https://pypi.python.org/pypi?%3Aaction=list_classifiers