Update JS dependencies (#15033)

* Update JS dependencies

- Update all JS dependencies
- For octicons, rename trashcan to trash
- For svgo, migrate to v2 api, output seems to have slightly changed but icons look the same
- For stylelint, update config, fix custom property duplicates
- For monaco, drop legacy Edge support
- For eslint, enable new rules, fix new issues
- For less-loader, remove deprecated import syntax

* update svgo usage in generate-images and rebuild logo.svg with it

1 files changed, 10 insertions, 21 deletions

diff --git a/build/generate-svg.js b/build/generate-svg.js
index 09e08e48dc..97053a2958 100755
--- a/build/generate-svg.js
+++ b/build/generate-svg.js
@@ -2,7 +2,7 @@
 'use strict';
 
 const fastGlob = require('fast-glob');
-const Svgo = require('svgo');
+const {optimize, extendDefaultPlugins} = require('svgo');
 const {resolve, parse} = require('path');
 const {readFile, writeFile, mkdir} = require('fs').promises;
 
@@ -25,31 +25,20 @@ async function processFile(file, {prefix, fullName} = {}) {
     if (prefix === 'octicon') name = name.replace(/-[0-9]+$/, ''); // chop of '-16' on octicons
   }
 
-  const svgo = new Svgo({
-    plugins: [
-      {removeXMLNS: true},
-      {removeDimensions: true},
+  const {data} = optimize(await readFile(file, 'utf8'), {
+    plugins: extendDefaultPlugins([
+      'removeXMLNS',
+      'removeDimensions',
       {
-        addClassesToSVGElement: {
-          classNames: [
-            'svg',
-            name,
-          ],
-        },
+        name: 'addClassesToSVGElement',
+        params: {classNames: ['svg', name]},
       },
       {
-        addAttributesToSVGElement: {
-          attributes: [
-            {'width': '16'},
-            {'height': '16'},
-            {'aria-hidden': 'true'},
-          ],
-        },
+        name: 'addAttributesToSVGElement',
+        params: {attributes: [{'width': '16'}, {'height': '16'}, {'aria-hidden': 'true'}]},
       },
-    ],
+    ]),
   });
-
-  const {data} = await svgo.optimize(await readFile(file, 'utf8'));
   await writeFile(resolve(outputDir, `${name}.svg`), data);
 }