Up pytest version.

arokem · arokem · commit 83e891227b1d · 2019-06-25T10:45:10.000-07:00
Maybe will fix this error: https://travis-ci.org/nipy/nitime/jobs/550415121 Not sure, but this suggests it might help: matplotlib/matplotlib#13181
diff --git a/requirements-dev.txt b/requirements-dev.txt
@@ -1,5 +1,5 @@
 sphinx
-pytest==3.6
+pytest==3.6.1
 pytest-cov
 nibabel
 networkx
