Update the setup.cfg to know it's a universal distribution.

adobeDan · adobeDan · commit 6750bcadc043 · 2016-12-12T23:35:34.000-08:00
diff --git a/setup.cfg b/setup.cfg
@@ -1,2 +1,4 @@
 [aliases]
 test=pytest
+[bdist_wheel]
+universal=1
