Merge pull request python3statement#213 from sloria/marshmallow

Add marshmallow

Author: takluyver

_sections/30-projects.md

@@ -36,6 +36,7 @@ These projects pledge to drop Python 2 support in or before 2020.
 - [![](assets/tensorpack.png)Tensorpack](https://github.com/tensorpack/tensorpack)
 - [![](assets/pytest1.png)pytest](https://docs.pytest.org/en/latest)
 - [![](assets/hypothesis.png)Hypothesis](https://hypothesis.readthedocs.io/)
+- [![](assets/marshmallow.png)marshmallow](https://github.com/marshmallow-code/marshmallow)
 - [![](assets/xonsh.png)xonsh](http://xon.sh)
 - [![](assets/astropy.png)Astropy](https://www.astropy.org/)
 - [![](assets/geopy.png)geopy](https://geopy.readthedocs.io/)

assets/marshmallow.png

@@ -280,6 +280,10 @@ $(document).ready(function (){
     'plyara':[
       {content: '2.x', start: '2019-02-01', end:'2020-01-01'},
     ],
+    'marshmallow':[
+      {content: '2.x', start: '2015-09-25', end:'2020-01-01', py2:true},
+      {content: '3.x', start: '2019-05-05', end:'2023-12-31'},
+    ],
 
     // for tests, rando example
     //'matplotlib':[