linting: enable eslint-plugin-n recommended rules

And fixes a lot of related issues.

scripts/.eslintrc.js

@@ -2,6 +2,9 @@
 
 module.exports = {
   rules: {
+    'n/no-process-exit': 'off',
+    'n/no-unpublished-require': 'off',
+    'n/shebang': 'off',
     'no-console': 'off',
   },
 }

scripts/babel-eslintrc.js

@@ -13,6 +13,21 @@ module.exports = {
         },
         sourceType: 'module',
       },
+
+      rules: {
+        // Native module (and this rule) requires file extensions, but Babel does not
+        'n/no-missing-import': 'off',
+
+        'n/no-unsupported-features/es-syntax': 'off',
+        'n/shebang': [
+          'error',
+          {
+            convertPath: {
+              'src/**/*.{,c,m}js': ['^src/(.+)$', 'dist/$1'],
+            },
+          },
+        ],
+      },
     },
   ],
 }