CI: update pinnings so tests run

tacaswell · tacaswell · commit 6538732ae06b · 2018-11-09T18:06:10.000-05:00
diff --git a/requirements/testing/travis35.txt b/requirements/testing/travis35.txt
@@ -8,4 +8,5 @@ pyparsing==2.0.1
 pytest==3.4
 pytest-cov==2.3.1
 pytest-timeout==1.2.1  # Newer pytest-timeouts don't support pytest 3.4.
+pytest-rerunfailures<5  # newer versions require pytest3.6
 sphinx==1.3
