add missing mcp230xx and 74hc595 requirements to setup.py

Author: brennen

requirements.txt

@@ -1,4 +1,4 @@
-adafruit-circuitpython-busdevice
 Adafruit-Blinka
+adafruit-circuitpython-74hc595
+adafruit-circuitpython-busdevice
 adafruit-circuitpython-mcp230xx
-adafruit-circuitpython-74hc595

setup.py

@@ -34,7 +34,12 @@
     author='Adafruit Industries',
     author_email='[email protected]',
 
-    install_requires=['Adafruit-Blinka', 'adafruit-circuitpython-busdevice'],
+    install_requires=[
+        'Adafruit-Blinka',
+        'adafruit-circuitpython-74hc595',
+        'adafruit-circuitpython-busdevice',
+        'adafruit-circuitpython-mcp230xx',
+    ],
 
     # Choose your license
     license='MIT',
@@ -57,4 +62,4 @@
     # You can just specify the packages manually here if your project is
     # simple. Or you can use find_packages().
     packages=['adafruit_character_lcd'],
-)
+)