Fix the "keyPrefix" option in static report sharing #724
Add support for getColorX and getTargetColorX to DeckGL Chart #718
Fixing Tornado on Windows + Python 3.8 #682
Fall back on webbrowser if xdg-open is not installed on Linux #701
Fixing number input spin buttons for Firefox #683
Fixing CTRL+ENTER on Windows #699
Do not automatically create credential file when in headless mode #467
Version 0.50.1
Release date: November 10, 2019
Highlights:
👩‍🎓 SymPy support and ability to draw mathematical expressions using LaTeX! See
  st.latex,
  st.markdown,
  and
  st.write.
🌄 You can now set config options using environment variables. For example,
  export STREAMLIT_SERVER_PORT=9876.
🐱 Ability to call streamlit run directly with Github and Gist URLs. No
  need to grab the "raw" URL first!
📃 Cleaner exception stack traces. We now remove all Streamlit-specific code
