Merge branch 'stable' of github.com:tbenthompson/cppimport into stable

Author: tbenthompson

README.md

@@ -1,7 +1,7 @@
 # cppimport - Import C++ directly from Python! 
 
 <p align=center>
-    <a target="_blank" href="https://www.python.org/downloads/" title="Python version"><img src="https://img.shields.io/badge/python-%3E=_3.6-green.svg"></a>
+    <a target="_blank" href="https://www.python.org/downloads/" title="Python version"><img src="https://img.shields.io/badge/python-%3E=_3.7-green.svg"></a>
     <a target="_blank" href="https://pypi.org/project/cppimport/" title="PyPI version"><img src="https://img.shields.io/pypi/v/cppimport?logo=pypi"></a>
     <a target="_blank" href="https://pypi.org/project/cppimport/" title="PyPI"><img src="https://img.shields.io/pypi/dm/cppimport"></a>
     <a target="_blank" href="LICENSE" title="License: MIT"><img src="https://img.shields.io/badge/License-MIT-blue.svg"></a>