chore: Upgrade eslint and prettier

Author: dmaccormack

.prettierrc.json

@@ -1,3 +1,4 @@
 {
-  "options.editorconfig": true
+  "options.editorconfig": true,
+  "trailingComma": "es5"
 }

babel.config.js

@@ -37,6 +37,7 @@ module.exports = (api) => {
   }
 
   return {
+    plugins: ["@babel/plugin-syntax-import-assertions"],
     presets: [["@babel/preset-env", opts]],
     exclude: ["node_modules/**"],
   };

.eslintrc.js renamed to eslint.config.js

@@ -22,28 +22,34 @@
   SOFTWARE.
 */
 
-"use strict";
+const babel = require("@babel/eslint-parser");
+const jest = require("eslint-plugin-jest");
+const prettier = require("eslint-plugin-prettier/recommended");
 
-/*
-  This defines global options. The ./src directory extends this file.
-*/
-
-module.exports = {
-  root: true,
-  extends: ["eslint:recommended", "plugin:prettier/recommended"],
-  env: {
-    es6: true,
+module.exports = [
+  prettier,
+  {
+    ignores: ["coverage/*", "**/dist/*", "apidoc/*", "backup/*"]
   },
-  ignorePatterns: ["node_modules/", "dist/", "backup/", "apidoc/", "coverage/"],
-  rules: {
-    "prettier/prettier": ["error", { endOfLine: "auto" }],
+  {
+    files: ["*.mjs", "src/*.js"],
+    languageOptions: {
+      sourceType: "module",
+      parser: babel,
+      parserOptions: {
+        babelOptions: {
+          configFile: "./babel.config.js"
+        },
+        importAttributes: true
+      }
+    }
   },
-  overrides: [
-    {
-      files: ["*.config.js", ".eslintrc.js", ".eslintrc.cjs"],
-      env: {
-        node: true,
-      },
+  {
+    files: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)+(spec|test).[jt]s?(x)'],
+    plugins: {
+      jest,
     },
-  ],
-};
+    ...jest.configs['flat/recommended'],
+  },
+]
+