Bump version to 0.9.1

Author: matthew-d-jones

setup.py

@@ -15,7 +15,7 @@
 
 setup(
     name="ess_streaming_data_types",
-    version="0.9.0",
+    version="0.9.1",
     description=DESCRIPTION,
     long_description=LONG_DESCRIPTION,
     long_description_content_type="text/markdown",