update Plotly.js to version 2.16.4

Author: striezel

changelog.md

@@ -10,6 +10,13 @@ Since [Plotly.js](https://plotly.com/javascript/) is the main dependency of this
 application, major version changes in Plotly.js will also trigger a major
 version change in this application.
 
+## Version 2.1.4 (2022-12-09)
+
+* __[maintenance]__
+The version of Plotly.js is bumped from 2.16.1 to 2.16.4.
+The new version contains a few fixes. For details on those see
+[the changelog of Plotly.js](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#2164----2022-12-07).
+
 ## Version 2.1.3 (2022-12-09)
 
 * __[maintenance]__

export-server/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "plotly-node-export-server",
-  "version": "2.1.3",
+  "version": "2.1.4",
   "description": "Plotly.js Node.js export server",
   "repository": {
     "url": "https://gitlab.com/striezel/plotly-node-export-server.git",

export-server/package.json

@@ -88,7 +88,7 @@ exports.render = async function(jsonData, filename, width, height) {
   };
 
   await
-  fs.promises.readFile('./plotly-2.16.1.min.js', 'utf-8')
+  fs.promises.readFile('./plotly-2.16.4.min.js', 'utf-8')
     .then(win.eval)
     .then(() => win.Plotly.toImage({data: [data], layout: layout, config: config},
                                    { format: 'svg', imageDataOnly: true }))