* develop:
  Bump vega from 5.17.1 to 5.17.3 in /frontend (streamlit#2541)
  Pick a random emoji on `st.set_page_config(emoji="random")` (streamlit#2020)
  Fix Jest warnings (streamlit#2523)
  Upgrade react-markdown (streamlit#2527)
  Upgrade react-hotkeys (streamlit#2525)
  Close streamlit#2495 (streamlit#2524)
  Remove unnecessary case statement (streamlit#2522)
  Bump @types/node from 12.19.9 to 14.14.16 in /frontend (streamlit#2526)
  Bump fetch-mock from 7.7.3 to 9.11.0 in /frontend (streamlit#2505)
  st.markdown now shows a link title (streamlit#2518)
  Bump @types/react-dom from 16.9.10 to 17.0.0 in /frontend (streamlit#2503)
  Fix caching list comprehensions (streamlit#2484)
  Add validation to st.slider ensuring `step` cannot be 0 (streamlit#2502)
  Ensure st.image works with UploadedFiles (streamlit#2512)
  Fix dataframe column sort (streamlit#2511)
  File uploader session check (streamlit#2498)
  Upgrade node-notifier to 8.0.1 or later (streamlit#2507)
  Fix st.number_input not using min_value as default value (streamlit#2499)
  Unblock Core patches, and add Marisa as a docs owner (streamlit#2501)
  Patch 0.73.1 (streamlit#2500)