chore: modernise linting setup

Author: me4502

.eslintignore

@@ -0,0 +1,38 @@
+import js from '@eslint/js';
+import globals from 'globals';
+import tseslint from 'typescript-eslint';
+import { defineConfig } from 'eslint/config';
+
+export default defineConfig(
+    js.configs.recommended,
+    {
+        languageOptions: {
+            ecmaVersion: 'latest',
+            sourceType: 'module',
+            globals: {
+                ...globals.browser,
+                ...globals.node,
+            },
+        },
+    },
+    tseslint.configs.eslintRecommended,
+    ...tseslint.configs.recommended,
+    {
+        files: ['**/*.ts', '**/*.tsx'],
+        languageOptions: {
+            parserOptions: {
+                projectService: true,
+            },
+        },
+        rules: {
+            '@typescript-eslint/consistent-type-imports': [
+                'error',
+                { prefer: 'type-imports', fixStyle: 'inline-type-imports' },
+            ],
+            '@typescript-eslint/consistent-type-exports': [
+                'error',
+                { fixMixedExportsWithInlineTypeSpecifier: true },
+            ],
+        },
+    }
+);

.eslintrc.js

@@ -27,7 +27,7 @@
         "test": "echo \"Error: no test specified\" && exit 1",
         "start": "yarn parcel test/test.html --port 3000 --host 0.0.0.0",
         "type-check": "yarn tsc --noEmit",
-        "lint": "yarn eslint --config ./.eslintrc.js --ext .js,.ts src/",
+        "lint": "yarn eslint src/",
         "postinstall": "yarn husky",
         "precommit": "yarn lint-staged"
     },
@@ -51,15 +51,16 @@
         "jszip": "^3.10.1"
     },
     "devDependencies": {
+        "@eslint/js": "^9.39.2",
         "@types/gzip-js": "^0.3.5",
-        "@typescript-eslint/eslint-plugin": "^5.62.0",
-        "@typescript-eslint/parser": "^5.62.0",
-        "eslint": "^8.57.1",
+        "eslint": "^9.39.2",
+        "globals": "^16.4.0",
         "husky": "^9.1.7",
         "lint-staged": "^16.2.7",
         "parcel": "^2.16.3",
         "prettier": "^3.7.4",
-        "typescript": "^5.9.3"
+        "typescript": "^5.9.3",
+        "typescript-eslint": "^8.50.0"
     },
     "browserslist": [
         "last 1 Chrome version"