(DOCSP-12746): v1.19 release notes (#418)

* (DOCSP-12746): v1.19 release notes

* typo fix

Author: jeff-allen-mongo

source/release-notes.txt

@@ -10,6 +10,55 @@ MongoDB Charts Cloud Release Notes
    :depth: 1
    :class: twocols
 
+|charts| v1.19.0
+----------------
+
+*Released October 13, 2020*
+
+Improvements in this release:
+
+- Introduces :ref:`Lookup Fields <add-lookup-field>` in the Chart
+  Builder.
+
+- Introduces binning on string-typed fields in category channels.
+
+- Adds ability to limit the number of documents displayed on
+  :ref:`Table Charts <data-table-ref>`.
+
+- Adds new tour showing virtual and lookup fields.
+
+Bug fixes in this release:
+
+- Field encodings are now correctly retained when swapping between
+  Geo Scatter and Geo Heatmap chart types.
+
+- Calculated fields that return objects can now be modified or deleted.
+
+- Fixes a rendering issue for Area charts when some bins or categories
+  had no values.
+
+- Geospatial charts can now be panned independently.
+
+- Fixes an issue when scatter charts with log scales were panned with
+  the mouse.
+
+- Changes to the :guilabel:`Filter Allow` list are now immediately
+  picked up by embedded charts.
+
+- Prevents some “white screen” errors from occurring in the Chart
+  Builder.
+
+- Allows editing chart titles while a chart is loading.
+
+- Empty arrays now show the ``[]`` symbol in the Chart Builder field
+  panel.
+
+- Improves the refresh behavior for expired authentication sessions.
+
+- |charts| no longer crashes when geospatial charts are rendered with
+  ``NaN`` coordinates.
+
+
 |charts| v1.18.0
 ----------------