add pytorch to list

Author: soumith

_sections/30-projects.md

@@ -15,6 +15,7 @@ These projects pledge to drop Python 2 support in or before 2020.
 - [![](assets/tensorflow.png)TensorFlow](https://www.tensorflow.org/) <!-- url:https://github.com/tensorflow/tensorflow sg:129626 -->
 - [![](assets/requests.png)Requests](https://github.com/psf/requests) <!-- url:https://github.com/psf/requests sg:39030 -->
 - [![](assets/scikit-learn.png)scikit-learn](https://scikit-learn.org/) <!-- url:https://github.com/scikit-learn/scikit-learn sg:35701 -->
+- [![](assets/pytorch.png)PyTorch](https://pytorch.org/) <!-- url:https://github.com/pytorch/pytorch sg:31795 -->
 - [![](assets/apache_spark.png)Apache Spark](https://spark.apache.org/) <!-- url:https://github.com/apache/spark sg:22305 -->
 - [![](assets/pandas.png)pandas](https://pandas.pydata.org/) <!-- url:https://github.com/pandas-dev/pandas sg:19989 -->
 - [![](assets/tornado.png)Tornado](http://www.tornadoweb.org/) <!-- url:https://github.com/tornadoweb/tornado sg:17904 -->