Add twitter badge

Author: gonzalocasas

README.md

@@ -7,6 +7,7 @@
 [![Conda - Latest Release](https://anaconda.org/conda-forge/compas/badges/version.svg)](https://anaconda.org/conda-forge/compas)
 [![Conda - Platform](https://img.shields.io/conda/pn/conda-forge/compas)](https://anaconda.org/conda-forge/compas)
 [![DOI](https://zenodo.org/badge/104857648.svg)](https://zenodo.org/badge/latestdoi/104857648)
+[![Twitter Follow](https://img.shields.io/twitter/follow/compas_dev?style=social)](https://twitter.com/compas_dev)
 
 The **COMPAS** framework is an open-source, Python-based framework for computational research and collaboration in architecture, engineering, digital fabrication and construction.