fix setup (needs json)

Robert Sachunsky · Robert Sachunsky · commit 6b5e72e6100d · 2020-06-30T15:51:48.000+02:00
diff --git a/setup.py b/setup.py
@@ -15,6 +15,7 @@
 """
 
 import codecs
+import json
 from setuptools import setup
 from setuptools import find_packages
 
