🎨 New color-picker widget! Use it with
  st.beta_color_picker()
🧪 Introducing st.beta_* and st.experimental_* function prefixes, for faster
  Streamlit feature releases. See
  docs for more info.
📦 Improved @st.cache support for SQL Alchemy objects, CompiledFFI, PyTorch
  Tensors, and builtins.mappingproxy.
Version 0.58.0
Release date: April 22, 2020
Highlights:
💼 Made st.selectbox filtering case-insensitive.
㈬ Better support for Tensorflow sessions in @st.cache.
📊 Changed behavior of st.pyplot to auto-clear the figure only when using
  the global Matplotlib figure (i.e. only when calling st.pyplot() rather
  than st.pyplot(fig)).
Version 0.57.0
Release date: March 26, 2020
Highlights:
⏲️ Ability to set expiration options for @st.cache'ed functions by setting
  the max_entries and ttl arguments. See
