Bump version to 0.9.4

  - Automatic commit via:
    pint set-version --branch master --version 0.9.4 -e prod confluent-kafka-python --no-dry-run

Author: Alex Ayars

setup.py

@@ -15,7 +15,7 @@
                              'confluent_kafka/src/Consumer.c'])
 
 setup(name='confluent-kafka',
-      version='0.9.2',
+      version='0.9.4',
       description='Confluent\'s Apache Kafka client for Python',
       author='Confluent Inc',
       author_email='support@confluent.io',