Update changelog

docs/changelog.md

@@ -16,6 +16,19 @@ This page lists highlights, bug fixes, and known issues for official Streamlit r
       $ pip install --upgrade streamlit
 ```
 
+## Version 0.63.0
+
+_Release date: July 13, 2020_
+
+**Highlights:**
+
+- 🧩 **Support for Streamlit Components!!!** See
+  [documentation](https://docs.streamlit.io/en/latest/streamlit_components.html) for more info.
+- 🕗 Support for datetimes in
+  [`st.slider`](https://docs.streamlit.io/en/latest/api.html#streamlit.slider). And, of course, just
+  like any other value you use in `st.slider`, you can also pass in two-element lists to get a
+  datetime range slider.
+
 ## Version 0.62.0
 
 _Release date: June 21, 2020_