Update pyobjc from 9.0.1 to 10.2

requirements.txt

@@ -1,7 +1,7 @@
 setuptools>=42.0.2
 wheel>=0.33.6
 py2app==0.28.7
-pyobjc==9.0.1
+pyobjc==10.2
 corefoundationasyncio==0.0.1
 cocoa-vanilla==0.2.4
 blackrenderer==0.6.0