Update eslint to version 9

.codacy.yml

@@ -0,0 +1,7 @@
+---
+exclude_paths:
+  - "eslint.config.mjs"
+include_paths:
+  - "src/**/*.ts"
+  - "test/**/*.ts"
+  - "example/**/*"

eslint.config.mjs

@@ -0,0 +1,254 @@
+import _import from "eslint-plugin-import";
+import jsdoc from "eslint-plugin-jsdoc";
+import node from "eslint-plugin-node";
+import unicorn from "eslint-plugin-unicorn";
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import { fixupPluginRules } from "@eslint/compat";
+import globals from "globals";
+import tsParser from "@typescript-eslint/parser";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all
+});
+
+export default [...compat.extends("prettier"), {
+  plugins: {
+    import: fixupPluginRules(_import),
+    jsdoc,
+    node,
+    unicorn,
+    "@typescript-eslint": typescriptEslint
+  },
+
+  files: ["**/*.ts"],
+
+  ignores: ["**/*.d.ts", "example/**"],
+
+  languageOptions: {
+    globals: {
+      ...globals.browser,
+      ...globals.node
+    },
+
+    parser: tsParser,
+    ecmaVersion: 5,
+    sourceType: "module",
+
+    parserOptions: {
+      project: "./tsconfig.json"
+    }
+  },
+
+  settings: {
+    "import/parsers": {
+      "@typescript-eslint/parser": [".ts", ".tsx"]
+    },
+
+    "import/resolver": {
+      typescript: {
+        alwaysTryTypes: true,
+        project: ["lib/tsconfig.json", "test/tsconfig.json", "doc-gen/tsconfig.json"]
+      }
+    }
+  },
+
+  rules: {
+    "@typescript-eslint/adjacent-overload-signatures": "error",
+
+    "@typescript-eslint/array-type": ["error", {
+      default: "array"
+    }],
+
+    "@typescript-eslint/ban-types": ["error", {
+      types: {
+        Object: {
+          message: "Avoid using the `Object` type. Did you mean `object`?"
+        },
+
+        Function: {
+          message: "Avoid using the `Function` type. Prefer a specific function type, like `() => void`."
+        },
+
+        Boolean: {
+          message: "Avoid using the `Boolean` type. Did you mean `boolean`?"
+        },
+
+        Number: {
+          message: "Avoid using the `Number` type. Did you mean `number`?"
+        },
+
+        String: {
+          message: "Avoid using the `String` type. Did you mean `string`?"
+        },
+
+        Symbol: {
+          message: "Avoid using the `Symbol` type. Did you mean `symbol`?"
+        },
+
+        Buffer: {
+          message: "Do not use Node.js specific Buffer type, use Uint8Array"
+        }
+      }
+    }],
+
+    "@typescript-eslint/consistent-type-assertions": "error",
+    "@typescript-eslint/dot-notation": "error",
+
+    "@typescript-eslint/indent": ["error", 2, {
+      ObjectExpression: "first",
+
+      FunctionDeclaration: {
+        parameters: "first"
+      },
+
+      FunctionExpression: {
+        parameters: "first"
+      },
+
+      SwitchCase: 1
+    }],
+
+    "@typescript-eslint/naming-convention": "off",
+
+    "@typescript-eslint/no-empty-function": ["error", {
+      allow: ["constructors"]
+    }],
+
+    "@typescript-eslint/no-empty-interface": "error",
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/no-misused-new": "error",
+    "@typescript-eslint/no-namespace": "error",
+    "@typescript-eslint/no-parameter-properties": "off",
+
+    "@typescript-eslint/no-shadow": ["error", {
+      hoist: "all"
+    }],
+
+    "@typescript-eslint/no-this-alias": "error",
+    "@typescript-eslint/no-unused-expressions": "error",
+    "@typescript-eslint/no-use-before-define": "off",
+    "@typescript-eslint/no-var-requires": "error",
+    "@typescript-eslint/prefer-for-of": "off",
+    "@typescript-eslint/prefer-function-type": "error",
+    "@typescript-eslint/prefer-namespace-keyword": "error",
+    "@typescript-eslint/quotes": "off",
+    "@typescript-eslint/semi": ["error", "always"],
+
+    "@typescript-eslint/triple-slash-reference": ["error", {
+      path: "always",
+      types: "prefer-import",
+      lib: "always"
+    }],
+
+    "@typescript-eslint/unified-signatures": "error",
+    "arrow-parens": ["error", "as-needed"],
+    "comma-dangle": "error",
+    complexity: "off",
+    "constructor-super": "error",
+    curly: "off",
+    "default-case": "off",
+    "dot-notation": "error",
+    eqeqeq: ["error", "smart"],
+    "guard-for-in": "off",
+
+    "id-denylist": [
+      "error",
+      "any",
+      "Number",
+      "number",
+      "String",
+      "string",
+      "Boolean",
+      "boolean",
+      "Undefined",
+      "undefined"
+    ],
+
+    "id-match": "error",
+
+    "import/no-extraneous-dependencies": ["error", {
+      devDependencies: true
+    }],
+
+    "import/no-internal-modules": "off",
+    "import/order": "off",
+
+    "import/no-unresolved": ["error", {
+      caseSensitiveStrict: true
+    }],
+
+    indent: "off",
+    "jsdoc/check-alignment": "error",
+    "jsdoc/check-indentation": "error",
+    "jsdoc/newline-after-description": "off",
+    "max-classes-per-file": "off",
+
+    "max-len": ["error", {
+      code: 200
+    }],
+
+    "new-parens": "error",
+    "no-bitwise": "off",
+    "no-buffer-constructor": "error",
+    "no-caller": "error",
+    "no-cond-assign": "error",
+    "no-console": "error",
+    "no-debugger": "error",
+    "no-duplicate-case": "error",
+    "no-duplicate-imports": "error",
+    "no-empty": "error",
+    "no-empty-function": "off",
+    "no-eval": "error",
+    "no-extra-bind": "error",
+    "no-fallthrough": "off",
+    "no-invalid-this": "off",
+    "no-new-func": "error",
+    "no-new-wrappers": "error",
+    "no-redeclare": "error",
+    "no-return-await": "error",
+    "no-restricted-globals": ["error", "Buffer"],
+    "no-restricted-imports": ["error", {
+      paths: ["node:buffer"]
+    }],
+    "no-sequences": "error",
+    "no-shadow": "off",
+    "no-sparse-arrays": "error",
+    "no-template-curly-in-string": "error",
+    "no-throw-literal": "error",
+    "no-trailing-spaces": "error",
+    "no-undef-init": "error",
+    "no-underscore-dangle": "error",
+    "no-unsafe-finally": "error",
+    "no-unused-expressions": "error",
+    "no-unused-labels": "error",
+    "no-use-before-define": "off",
+    "no-var": "error",
+    "node/file-extension-in-import": ["error", "always"],
+    "node/no-extraneous-import": "error",
+    "object-shorthand": "error",
+    "one-var": ["error", "never"],
+    "prefer-const": "error",
+    "prefer-object-spread": "error",
+    "quote-props": ["error", "as-needed"],
+    quotes: "off",
+    radix: "error",
+    semi: "error",
+    "space-in-parens": ["error", "never"],
+
+    "spaced-comment": ["error", "always", {
+      markers: ["/"]
+    }],
+
+    "unicorn/prefer-ternary": "error",
+    "use-isnan": "error",
+    "valid-typeof": "off"
+  }
+}];

package.json

@@ -84,7 +84,7 @@
     "compile-test": "tsc -p test",
     "compile-doc": "tsc -p doc-gen",
     "compile": "npm run compile-src && npm run compile-test && npm run compile-doc",
-    "eslint": "eslint lib/**/*.ts --ignore-pattern lib/**/*.d.ts example/typescript/**/*.ts test/**/*.ts doc-gen/**/*.ts",
+    "eslint": "eslint lib test doc-gen",
     "lint-md": "remark -u preset-lint-markdown-style-guide .",
     "lint": "npm run lint-md && npm run eslint",
     "test": "mocha",
@@ -105,25 +105,29 @@
     "uint8array-extras": "^1.4.0"
   },
   "devDependencies": {
+    "@eslint/compat": "^1.1.1",
+    "@eslint/eslintrc": "^3.1.0",
+    "@eslint/js": "^9.7.0",
     "@types/chai": "^4.3.16",
     "@types/chai-as-promised": "^7.1.8",
     "@types/debug": "^4.1.12",
     "@types/file-type": "^10.9.1",
     "@types/mocha": "^10.0.7",
     "@types/node": "^20.14.11",
-    "@typescript-eslint/eslint-plugin": "^7.16.0",
-    "@typescript-eslint/parser": "^7.16.0",
+    "@typescript-eslint/eslint-plugin": "^7.16.1",
+    "@typescript-eslint/parser": "^7.16.1",
     "c8": "^10.1.2",
     "chai": "^5.1.1",
     "chai-as-promised": "^8.0.0",
     "del-cli": "^5.1.0",
-    "eslint": "^8.57.0",
+    "eslint": "^9.7.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-import-resolver-typescript": "^3.6.1",
     "eslint-plugin-import": "^2.29.1",
     "eslint-plugin-jsdoc": "^48.7.0",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-unicorn": "^54.0.0",
+    "globals": "^15.8.0",
     "mime": "^4.0.4",
     "mocha": "^10.6.0",
     "npm-run-all": "^4.1.5",