Update dependencies and create DEPENDENCY-NOTES.md

Dependencies are updated to their latest versions. In cases where they
are not being updated to their latest versions, add a note to
DEPENDENCY-NOTES.md explaining why it is not being updated.

Due to changes in the eslint dependency, create an eslint config file.
Remove the deprecated .eslintignore and .eslintrc files.

Update jest config to use transform property instead of deprecated
globals property. Create test/tsconfig.json to use with updated jest
config.

Update tsconfig to target ES2018 to satisfy updated typescript compiler.

Minor changes to usage of commander package in app.ts.

Other formatting and style changes in various typescript files in order
to satisfy latest eslint rules.

DEPENDENCY-NOTES.md

@@ -0,0 +1,9 @@
+As of 2024 August 22:
+
+The `npm outdated` command reports the following dependencies as outdated.
+They are not being updated at this time for the reasons given below:
+
+- `@types/node`: don't update until Node 22 is LTS version (currently Node 20).
+- `chalk`: major version 5 causes problems for jest. Keep updated to latest 4.x release.
+- `flat`: major version 6 is an esmodule.
+- `yaml`: changes to `Document.toString()` behavior makes the comments in the config file produced by `sushi init` move around a bunch.

eslint.config.mjs

@@ -0,0 +1,52 @@
+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 [
+  {
+    ignores: [
+      'dist/*',
+      'coverage/*',
+      'build*/*',
+      '**/*.d.ts',
+      'src/public/',
+      'src/types/',
+      '**/generated'
+    ]
+  },
+  ...compat.extends('plugin:@typescript-eslint/recommended', 'prettier'),
+  {
+    languageOptions: {
+      parser: tsParser,
+      ecmaVersion: 2018,
+      sourceType: 'module'
+    },
+
+    rules: {
+      semi: ['error', 'always'],
+
+      quotes: [
+        'error',
+        'single',
+        {
+          avoidEscape: true
+        }
+      ],
+
+      '@typescript-eslint/ban-ts-comment': 'off',
+      '@typescript-eslint/explicit-function-return-type': 'off',
+      '@typescript-eslint/no-empty-function': 'off',
+      '@typescript-eslint/no-explicit-any': 'off',
+    }
+  }
+];

jest.config.js

@@ -1,8 +1,11 @@
 module.exports = {
-  globals: {
-    'ts-jest': {
-      tsconfig: 'tsconfig.json'
-    }
+  transform: {
+    '^.+\\.(js|jsx|ts|tsx)$': [
+      'ts-jest',
+      {
+        tsconfig: '<rootDir>/test/tsconfig.json'
+      }
+    ]
   },
   moduleFileExtensions: ['js', 'ts'],
   testMatch: ['**/test/**/*.test.(ts|js)'],