Add Pelican to projects pledged to go Python 3-only

Author: justinmayer

_sections/30-projects.md

@@ -30,6 +30,7 @@ These projects pledge to drop Python 2 support in or before 2020.
 - [![](assets/bokeh.png)Bokeh](https://github.com/bokeh/bokeh) <!-- url:https://github.com/bokeh/bokeh sg:9580 -->
 - [![](assets/matplotlib.png)Matplotlib](https://matplotlib.org/) <!-- url:https://github.com/matplotlib/matplotlib sg:9435 -->
 - [![](assets/kivy.png)Kivy](https://kivy.org/) <!-- url:https://github.com/kivy/kivy sg:9413 -->
+- [![](assets/pelican.png)Pelican](https://getpelican.com/) <!-- url:https://github.com/getpelican/pelican sg:9202 -->
 - [![](assets/pillow.png)Pillow](https://github.com/python-pillow/Pillow) <!-- url:https://github.com/python-pillow/Pillow sg:6309 -->
 - [![](assets/scipyshiny_small.png)SciPy](https://www.scipy.org/) <!-- url:https://github.com/scipy/scipy sg:5942 -->
 - [![](assets/sympy.png)SymPy](https://www.sympy.org/) <!-- url:https://github.com/sympy/sympy sg:5941 -->