Cache jupyter node_modules deps.

Author: theengineear

circle.yml

@@ -8,7 +8,7 @@ machine:
     PLOTLY_TOX_PYTHON_33: /home/ubuntu/.pyenv/versions/3.3.3/bin/python3.3
     PLOTLY_TOX_PYTHON_34: /home/ubuntu/.pyenv/versions/3.4.3/bin/python3.4
     PLOTLY_TOX_PYTHON_35: /home/ubuntu/.pyenv/versions/3.5.0/bin/python3.5
-    PLOTLY_JUPYTER_TEST_DIR: ${PLOTLY_PACKAGE_ROOT}/plotly/tests/test_core/test_jupyter
+    PLOTLY_JUPYTER_TEST_DIR: /home/ubuntu/${CIRCLE_PROJECT_REPONAME}/plotly/tests/test_optional/test_jupyter
 
   node:
     version: 4.2.1
@@ -32,6 +32,7 @@ dependencies:
 
     # cache everything that tox installs for us.
     - .tox
+    - ${PLOTLY_JUPYTER_TEST_DIR}/node_modules
 
 test: