- Optimization: Re-rerun image optimization per update

- Linting (ESLint): Adjust per now applied rules
- Testing: Accessibility test API update
- Docs: Clarify need for Node.js/npm being installed
- npm: Update devDeps and core-js-bundle copy; add new axe testing peer dep. axe-core

editor/extensions/ext-imagelib.js

@@ -150,6 +150,7 @@ export default {
 
         if (mode !== 'm') {
           await $.process_cancel(message);
+          // eslint-disable-next-line require-atomic-updates
           transferStopped = true;
           // Should a message be sent back to the frame?