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

.eslintrc

@@ -344,6 +344,7 @@ rules:
   unicode-bom: [2, never]
   unicorn/better-regex: [0]
   unicorn/catch-error-name: [0]
+  unicorn/consistent-destructuring: [2]
   unicorn/consistent-function-scoping: [2]
   unicorn/custom-error-definition: [0]
   unicorn/empty-brace-spaces: [2]
@@ -356,7 +357,9 @@ rules:
   unicorn/import-style: [0]
   unicorn/new-for-builtins: [2]
   unicorn/no-abusive-eslint-disable: [0]
+  unicorn/no-array-for-each: [0]
   unicorn/no-array-instanceof: [0]
+  unicorn/no-array-push-push: [2]
   unicorn/no-console-spaces: [0]
   unicorn/no-fn-reference-in-iterator: [0]
   unicorn/no-for-loop: [0]
@@ -364,11 +367,14 @@ rules:
   unicorn/no-keyword-prefix: [0]
   unicorn/no-lonely-if: [2]
   unicorn/no-nested-ternary: [0]
+  unicorn/no-new-array: [0]
   unicorn/no-new-buffer: [0]
   unicorn/no-null: [0]
   unicorn/no-object-as-default-parameter: [2]
   unicorn/no-process-exit: [0]
   unicorn/no-reduce: [2]
+  unicorn/no-static-only-class: [2]
+  unicorn/no-this-assignment: [2]
   unicorn/no-unreadable-array-destructuring: [0]
   unicorn/no-unsafe-regex: [0]
   unicorn/no-unused-properties: [2]
@@ -378,8 +384,12 @@ rules:
   unicorn/numeric-separators-style: [0]
   unicorn/prefer-add-event-listener: [2]
   unicorn/prefer-array-find: [2]
+  unicorn/prefer-array-flat: [2]
+  unicorn/prefer-array-index-of: [2]
+  unicorn/prefer-array-some: [2]
   unicorn/prefer-dataset: [2]
   unicorn/prefer-date-now: [2]
+  unicorn/prefer-default-parameters: [0]
   unicorn/prefer-event-key: [2]
   unicorn/prefer-includes: [2]
   unicorn/prefer-math-trunc: [2]
@@ -391,6 +401,7 @@ rules:
   unicorn/prefer-optional-catch-binding: [2]
   unicorn/prefer-query-selector: [0]
   unicorn/prefer-reflect-apply: [0]
+  unicorn/prefer-regexp-test: [2]
   unicorn/prefer-replace-all: [0]
   unicorn/prefer-set-has: [0]
   unicorn/prefer-spread: [0]