Adding version badge

Author: Jason Costello

README.md

@@ -1,6 +1,7 @@
 # hypervector-wrapper
 
-![example workflow](https://github.com/hypervectorio/hypervector-wrapper/actions/workflows/main.yml/badge.svg)
+![workflow](https://github.com/hypervectorio/hypervector-wrapper/actions/workflows/main.yml/badge.svg)
+[![PyPI version](https://badge.fury.io/py/hypervector-wrapper.svg)](https://pypi.python.org/pypi/hypervector-wrapper/)
 
 Python wrapper to access the Hypervector API, providing easy deserialisation of Hypervector
 resources to Python objects for building your data-driven test suite.