add python 3.9 to testing.

ikirudennis · ikirudennis · commit a149a1d14668 · 2021-11-23T09:43:28.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -8,6 +8,7 @@ python:
   - "3.6"
   - "3.7"
   - "3.8"
+  - "3.9"
   # PyPy versions
   - "pypy3"
 # command to install dependencies
