Add in 3.4.1 version again.

Author: theengineear

circle.yml

@@ -2,7 +2,7 @@ machine:
   environment:
     PLOTLY_PACKAGE_ROOT: /home/ubuntu/python-api
     PLOTLY_CONFIG_DIR: ${HOME}/.plotly
-    PLOTLY_PYTHON_VERSIONS: 2.6.8 2.7.8 3.3.3
+    PLOTLY_PYTHON_VERSIONS: 2.6.8 2.7.8 3.3.3 3.4.1
     PLOTLY_CORE_REQUIREMENTS_FILE: ${PLOTLY_PACKAGE_ROOT}/requirements.txt
     PLOTLY_OPTIONAL_REQUIREMENTS_FILE: ${PLOTLY_PACKAGE_ROOT}/optional-requirements.txt
     PLOTLY_OPTIONAL_REQUIREMENTS_FILE_2_6: ${PLOTLY_PACKAGE_ROOT}/optional-requirements-2-6.txt