⬆️ Update dependencies and migrate eslint from v8 to v9

assets/boundaries/generate.js

@@ -18,7 +18,7 @@ const BRING_TO_BACK = [
 
 fetch(BOUNDARIES.JOSM).then(response => response.text()).then(text => {
   const geojson = osmtogeojson(
-    new DOMParser().parseFromString(text)
+    new DOMParser().parseFromString(text, 'application/xml')
   );
 
   geojson.features.forEach((feature, index) => {

eslint.config.mjs

@@ -0,0 +1,60 @@
+import globals from 'globals';
+import js from '@eslint/js';
+
+export default [
+  js.configs.recommended, {
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.browser,
+      },
+      ecmaVersion: 2020,
+      sourceType: 'module',
+    },
+    rules: {
+      semi: 'warn',
+      'semi-style': 'error',
+      'semi-spacing': 'warn',
+      camelcase: 'error',
+
+      quotes: ['warn', 'single', {
+        avoidEscape: true,
+        allowTemplateLiterals: false,
+      }],
+
+      'brace-style': 'error',
+      indent: ['error', 2],
+      'no-eval': 'error',
+      'no-implied-eval': 'error',
+
+      'prefer-const': 'error',
+      'no-var': 'warn',
+      'prefer-arrow-callback': 'warn',
+      'prefer-rest-params': 'error',
+      'prefer-spread': 'error',
+      'prefer-template': 'warn',
+      'template-curly-spacing': 'warn',
+      'symbol-description': 'error',
+      'object-shorthand': 'warn',
+      'prefer-promise-reject-errors': 'error',
+      'prefer-destructuring': 'warn',
+      'prefer-numeric-literals': 'warn',
+
+      'no-new-object': 'error',
+      eqeqeq: ['error', 'smart'],
+      curly: ['error', 'all'],
+      'dot-location': ['error', 'property'],
+      'dot-notation': 'error',
+      'no-array-constructor': 'error',
+      'no-throw-literal': 'error',
+      'no-self-compare': 'error',
+      'no-useless-call': 'warn',
+      'spaced-comment': 'warn',
+      'no-multi-spaces': 'warn',
+      'no-new-wrappers': 'error',
+      'no-script-url': 'error',
+      'no-void': 'warn',
+      'vars-on-top': 'warn',
+      'require-await': 'warn'
+    }
+  }];