Update JS dependencies, use Node 16 (#15804)

- Update all JS dependencies to latest version
- Use Node 16 on CI
- Add new lint rules
- Add some gitignore entries for debug files

Co-authored-by: Lauris BH <lauris@nix.lv>

.eslintrc

@@ -366,6 +366,7 @@ rules:
   unicorn/no-array-instanceof: [0]
   unicorn/no-array-push-push: [2]
   unicorn/no-console-spaces: [0]
+  unicorn/no-document-cookie: [2]
   unicorn/no-fn-reference-in-iterator: [0]
   unicorn/no-for-loop: [0]
   unicorn/no-hex-escape: [0]
@@ -389,6 +390,7 @@ rules:
   unicorn/numeric-separators-style: [0]
   unicorn/prefer-add-event-listener: [2]
   unicorn/prefer-array-find: [2]
+  unicorn/prefer-array-flat-map: [2]
   unicorn/prefer-array-flat: [2]
   unicorn/prefer-array-index-of: [2]
   unicorn/prefer-array-some: [2]
@@ -399,8 +401,10 @@ rules:
   unicorn/prefer-includes: [2]
   unicorn/prefer-math-trunc: [2]
   unicorn/prefer-modern-dom-apis: [0]
+  unicorn/prefer-module: [2]
   unicorn/prefer-negative-index: [2]
   unicorn/prefer-node-append: [0]
+  unicorn/prefer-node-protocol: [0]
   unicorn/prefer-node-remove: [0]
   unicorn/prefer-number-properties: [0]
   unicorn/prefer-optional-catch-binding: [2]