Stop specifying precise pypy3.5 version

jstasiak · jstasiak · commit c2e8bdebc6ce · 2019-10-26T23:44:50.000+02:00
This allows us to test with the latest available one.
diff --git a/.travis.yml b/.travis.yml
@@ -4,7 +4,7 @@ python:
     - "3.6"
     - "3.7"
     - "3.8"
-    - "pypy3.5-5.10.1"
+    - "pypy3.5"
 install:
     - pip install -r requirements-dev.txt
     # mypy can't be installed on pypy
