Merge pull request #69 from bird-house/new-jupyter-env

jupyter: new updated image with new handcalcs package

Matching PR to deploy the new jupyter image to PAVICS.

See PR Ouranosinc/PAVICS-e2e-workflow-tests#50
(commit Ouranosinc/PAVICS-e2e-workflow-tests@02333bf)
that built the new image with the detailed change vs the previous image.

Add handcalcs https://github.com/connorferster/handcalcs/ and unpin hvplot
since pinning did not solve violin plot issue, see this comment
#63 (comment)

Successful Jenkins build
http://jenkins.ouranos.ca/job/PAVICS-e2e-workflow-tests/job/periodic-rebuild-and-add-handcalcs/1/console

Noticeable changes:
```diff
>     - handcalcs==0.8.1

<     - xclim==0.18.0
>     - xclim==0.19.0

<   - hvplot=0.5.2=py_0
>   - hvplot=0.6.0=pyh9f0ad1d_0

<   - dask=2.22.0=py_0
>   - dask=2.26.0=py_0

<   - bokeh=2.1.1=py37hc8dfbb8_0
>   - bokeh=2.2.1=py37hc8dfbb8_0

<   - numba=0.50.1=py37h0da4684_1
>   - numba=0.51.2=py37h9fdb41a_0
```

birdhouse/default.env

@@ -2,7 +2,7 @@
 # All env in this default.env must not depend on any env in env.local.
 
 # Jupyter single-user server image
-export DOCKER_NOTEBOOK_IMAGE="pavics/workflow-tests:200803"
+export DOCKER_NOTEBOOK_IMAGE="pavics/workflow-tests:200914.1"
 
 export FINCH_IMAGE="birdhouse/finch:version-0.5.2"