missing keywords

Author: gpongelli

setup.py

@@ -58,7 +58,8 @@
         "Programming Language :: Python :: 3",
     ],
     # What does your project relate to?
-    keywords="adafruit blinka circuitpython micropython gpio_expander gpio expander ",
+    keywords="adafruit blinka circuitpython micropython gpio_expander gpio expander PCA9534 PCA9535 PCA9555 TCA9534 "
+             "TCA9535 TCA9555",
 
     # You can just specify the packages manually here if your project is
     # simple. Or you can use find_packages().