Updated list of dependencies

Author: jeipollack

docs/source/dependencies.md

@@ -8,6 +8,7 @@ Third-party software packages required by WaveDiff are installed automatically (
 |--------------|---------------------------------------------------|
 | [numpy](https://numpy.org/)                  | {cite:t}`harris:20` | 
 | [scipy](https://scipy.org)                   | {cite:t}`SciPy-NMeth:20` |
+| [keras](https://keras.io)                    | {cite:t}`chollet:2015keras`|
 | [tensorflow](https://www.tensorflow.org)     | {cite:t}`tensorflow:15` |
 | [tensorflow-addons](https://www.tensorflow.org/addons) |{cite:t}`tensorflow:15` |
 | [tensorflow-estimator](https://www.tensorflow.org/api_docs/python/tf/estimator) |{cite:t}`tensorflow:15` |
@@ -17,4 +18,5 @@ Third-party software packages required by WaveDiff are installed automatically (
 | [galsim](http://galsim-developers.github.io/GalSim/_build/html/index.html#) |    {cite:t}`rowe:15`        |
 | [astropy](https://www.astropy.org) |   {cite:t}`astropy:13,astropy:18`, <br>{cite:t}`astropy:22`       |
 | [matplotlib](https://matplotlib.org) |   {cite:t}`Hunter:07`    |
+| [pandas](https://pandas.pydata.org)  | {cite:t}`mckinney:2010pandas`   |
 | [seaborn](https://seaborn.pydata.org)   |    {cite:t}`Waskom:21`        |