TST: Install ipykernel&nbconvert instead of jupyter.

QuLogic · QuLogic · commit 9d389ba03ba4 · 2018-09-28T06:06:48.000-04:00
We do not need the whole Jupyter stack, and it currently installs
packages that do not work with each other. Installing just ipykernel and
nbconvert is lighter and avoids the conflict.
diff --git a/requirements/testing/travis36.txt b/requirements/testing/travis36.txt
@@ -2,6 +2,7 @@
 
 flake8
 flake8-per-file-ignores
-jupyter
+ipykernel
+nbconvert[execute]
 pandas
 pytz
