- Linting (ESLint): Update polyfills to new compat rules of

eslint-config-ash-nazg and adhere to new rules (prefer `for-of`
  (or array methods) to `for`, catch preferred `includes` to `indexOf`);
  avoid `no-zero-fractions` rule for now
- npm: Update devDeps (removing one unneeded)

CHANGES.md

@@ -13,10 +13,15 @@
 - Enhancement: Add CAD Placemark extension (@NeiroNx)
 - Refactoring: Make dialog OK button retrievable locale-independently
     via a `data-ok` attribute (using for testing)
+- Linting (ESLint): Update polyfills to new compat rules of
+  eslint-config-ash-nazg and adhere to new rules (prefer `for-of`
+  (or array methods) to `for`, catch preferred `includes` to `indexOf`);
+  avoid `no-zero-fractions` rule for now
 - Testing (UI Refactoring): Abstract out to helper file functions
 - Testing (UI Refactoring): Avoid testing being locale-dependent;
     approve storage (and set locale to English) before each test
-- npm: Update devDeps; update nested deps for security audit
+- npm: Update devDeps; update nested deps for security audit; remove
+  one unneeded)
 
 ## 4.2.0