MAINT: update changelog for Altair 3.0
## Version 3.0.0 (unreleased)
-Update to Vega-Lite 3.2 and Vega 5.0 & support all new features. See
+Update to Vega-Lite 3.2 and Vega 5.3 & support all new features. See
https://github.com/vega/vega-lite/releases/tag/v3.0.0 for Vega-Lite
feature lists.
@@ -11,28 +11,14 @@ feature lists.
- new compound marks: ``mark_boxplot()``, ``mark_errorband()``, ``mark_errorbar()``
- new transforms: ``transform_impute()``, ``transform_joinaggregate()``, ``transform_flatten()``
``transform_fold()``, ``transform_sample()``, ``transform_stack()``
-- tooltips enabled by default. Pass encoding ``tooltip=None`` to disable.
-- new ``columns`` keyword that allows wrapped faceting and concatenation.
-
-### Backward-incompatible changes:
-
-- selections can be bound to scales directly; i.e. you can use
- ```
- alt.Scale(domain=selection)
- ```
- instead of
- ```
- alt.Scale(domain=selection.ref())
- ```
-
-- selections can no longer be passed directly as chart properties; i.e. you should use
- ```
- chart.add_selection(selection1, selection2)
- ```
- instead of
- ```
- chart.properties(selection=selection1 + selection2)
- ```
+- new ``facet`` encoding that is similar to the ``row`` and ``column`` encoding, but
+ allows for wrapped facets
+- new ``alt.concat()`` function that is similar to ``alt.hconcat`` and ``alt.vconcat``,
+ but allows for more general wrapped concatenation
+- new ``columns`` keyword that allows wrapped faceting, repeating, and concatenation.
+- many, many bug fixes
+- tooltips can now be automatically populated using the ``tooltip`` mark configuration.
+- ability to specify initial condisions for selections
## Version 2.4.1 (Released February 21, 2019)
