fix automatic pypi uploads (#175)

* updated the changelog to warn about breaking changes

* updating versioning for pypi release

Author: kimberlythegeek

setup.py

@@ -11,6 +11,7 @@
 setup(
     name="axe-selenium-python",
     use_scm_version=True,
+    setup_requires=["setuptools_scm"],
     description="Python library to integrate axe and selenium for web \
                 accessibility testing.",
     long_description=open("README.rst").read(),