Fix TypeScript type imports

Closes GH-6.

Reviewed-by: Christian Murphy <christian.murphy.42@gmail.com>
Reviewed-by: Titus Wormer <tituswormer@gmail.com>

Author: remcohaszing

lib/index.js

@@ -10,11 +10,11 @@
  * @typedef {import('mdast-util-from-markdown').OnEnterError} OnEnterError
  * @typedef {import('mdast-util-from-markdown').OnExitError} OnExitError
  * @typedef {import('estree-jsx').Program} Program
- * @typedef {import('./complex-types').MdxJsxAttributeValueExpression} MdxJsxAttributeValueExpression
- * @typedef {import('./complex-types').MdxJsxAttribute} MdxJsxAttribute
- * @typedef {import('./complex-types').MdxJsxExpressionAttribute} MdxJsxExpressionAttribute
- * @typedef {import('./complex-types').MdxJsxFlowElement} MdxJsxFlowElement
- * @typedef {import('./complex-types').MdxJsxTextElement} MdxJsxTextElement
+ * @typedef {import('./complex-types.js').MdxJsxAttributeValueExpression} MdxJsxAttributeValueExpression
+ * @typedef {import('./complex-types.js').MdxJsxAttribute} MdxJsxAttribute
+ * @typedef {import('./complex-types.js').MdxJsxExpressionAttribute} MdxJsxExpressionAttribute
+ * @typedef {import('./complex-types.js').MdxJsxFlowElement} MdxJsxFlowElement
+ * @typedef {import('./complex-types.js').MdxJsxTextElement} MdxJsxTextElement
  * @typedef {{name: string|null, attributes: (MdxJsxAttribute|MdxJsxExpressionAttribute)[], close?: boolean, selfClosing?: boolean, start: Token['start'], end: Token['start']}} Tag
  *
  * @typedef ToMarkdownOptions

tsconfig.json

@@ -4,7 +4,7 @@
     "target": "ES2020",
     "lib": ["ES2020"],
     "module": "ES2020",
-    "moduleResolution": "node",
+    "moduleResolution": "node16",
     "allowJs": true,
     "checkJs": true,
     "declaration": true,