Updates to README.md

Author: jdhughes-dev

README.md

@@ -1,7 +1,7 @@
 
 <img src="https://raw.githubusercontent.com/modflowpy/flopy/master/examples/images/flopy3.png" alt="flopy3" style="width:50;height:20">
 
-### Version 3.2.6-dev
+### Version 3.2.6
 [![Build Status](https://travis-ci.org/modflowpy/flopy.svg?branch=master)](https://travis-ci.org/modflowpy/flopy)
 [![PyPI Version](https://img.shields.io/pypi/v/flopy.png)](https://pypi.python.org/pypi/flopy)
 [![PyPI Downloads](https://img.shields.io/pypi/dm/flopy.png)](https://pypi.python.org/pypi/flopy)