pin ipykernel and jupyter_client for bug fixes needed in adaptive

dev.yml

@@ -28,6 +28,8 @@ dependencies:
   - python-graphviz
   - xarray
   - pillow
+  - ipykernel>=4.8*  # needed for adaptive
+  - jupyter_client>=5.2.2  # needed for adaptive
   - pip:
     - git+https://github.com/ioam/holoviews.git
     - git+https://github.com/python-adaptive/adaptive.git

python3.yml

@@ -23,6 +23,8 @@ dependencies:
   - hpc05
   - ipyparallel
   # jupyter tools and extensions
+  - jupyter_client>=5.2.2  # needed for adaptive
+  - ipykernel>=4.8*  # needed for adaptive
   - jupyter_cms
   - jupyter_dashboards
   - jupyterlab