- Linting (ESLint): Stricter rules (or switch to warning)

- Breaking internal API change: `updateGripCursor` moved to be class method of Selector rather than instance method
- Breaking internal API change: `subpathIsClosed` moved to be class method of `Path` rather than instance method
- Refactoring: Reuse utilities base64 encoder for SVG icons plugin
- Docs (JSDoc): Fix return of the `mouseUp` (can also be an object) and `mouseDown` (may also be a boolean) of `pathActions`; other JSDoc additions/improvements

test/ui-tests/ui.js

@@ -6,14 +6,14 @@ import {Selector} from 'testcafe';
 fixture`TestCafe UI tests`
   .page`http://localhost:8000/editor/svg-editor.html`;
 
-test('Editor - No parameters: Export button', async t => {
+test('Editor - No parameters: Export button', async (t) => {
   await t
     .click('#dialog_buttons > input[type=button][value=OK]')
     .click('#main_icon')
     .expect(Selector('#tool_export')).ok('Has open button');
 });
 
-test('Editor - No parameters: Export button clicking', async t => {
+test('Editor - No parameters: Export button clicking', async (t) => {
   await t
     .click('#dialog_buttons > input[type=button][value=OK]')
     .click('#main_icon')