Merge pull request #3510 from plotly/pjs28

update plotly.js to 2.8.0

Author: nicolaskruchten

Diff for: CHANGELOG.md

@@ -2,6 +2,15 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## UNRELEASED
+
+### Updated
+  - Updated Plotly.js to from version 2.6.3 to version 2.8.0. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#280----2021-12-10) for more information. Notable changes include:
+    - Horizontal color bars
+    - texttemplate for histogram-like traces
+    - text for heatmap-like traces
+
+
 ## [5.4.0] - 2021-11-15
 
 ### Fixed

Diff for: packages/javascript/jupyterlab-plotly/package-lock.json

@@ -65,7 +65,7 @@
     "@lumino/messaging": "^1.2.3",
     "@lumino/widgets": "^1.8.1",
     "lodash": "^4.17.4",
-    "plotly.js": "^2.6.3"
+    "plotly.js": "^2.8.0"
   },
   "jupyterlab": {
     "extension": "lib/jupyterlab-plugin",