API improvements and refactoring.

.eslintrc.cjs

@@ -0,0 +1,50 @@
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint', 'prettier', 'jsdoc'],
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:node/recommended',
+    'plugin:jsdoc/recommended',
+    'plugin:unicorn/recommended',
+    'prettier',
+  ],
+  parserOptions: {
+    ecmaVersion: 2018,
+    sourceType: 'module',
+  },
+  env: {
+    browser: false,
+    node: true,
+    es6: true,
+  },
+  rules: {
+    '@typescript-eslint/no-unused-vars': 'error',
+    'unicorn/no-reduce': 'off',
+    'unicorn/prevent-abbreviations': 'off',
+    'unicorn/no-process-exit': 'off',
+    'unicorn/import-style': 'off',
+    'node/no-missing-import': 'off',
+    'node/no-unsupported-features/es-syntax': [
+      'error',
+      {
+        ignores: ['modules'],
+      },
+    ],
+    'node/no-extraneous-import': ['error'],
+    'node/no-unpublished-import': [
+      'error',
+      {
+        allowModules: ['vite', 'vitest'],
+      },
+    ],
+  },
+  overrides: [
+    {
+      files: ['tests/fixtures/fake-bin.js', 'tests/fixtures/fake-bin-with-env.js'],
+      rules: {
+        'node/shebang': 'off',
+      },
+    },
+  ],
+};

.prettierrc.cjs

@@ -0,0 +1,5 @@
+module.exports = {
+  singleQuote: true,
+  trailingComma: 'es5',
+  printWidth: 100,
+};

README.md

@@ -53,15 +53,14 @@ describe('Some tests', () => {
     expect(result.stdout).toBe('Did some stuff');
   });
 
-  // Write a file with contents to the tmp directory
   test('another test', () => {
-    project.write({
+    // Write a file with contents to the tmp directory
+    await project.writeJSON({
       'some/file.txt': 'some content',
     });
 
-    const result = await runBin({
-      args: ['--path', 'some/file.txt'], // pass some args to the bin that will be used for only this invocation
-    });
+    // pass some args to the bin that will be used for only this invocation
+    const result = await runBin('--path', 'some/file.txt');
 
     expect(result.stdout).toBe('Read "some/file.txt"');
   });