Fix type imports for Node16 module resolution

Closes GH-3.

Reviewed-by: JounQin <admin@1stg.me>
Reviewed-by: Christian Murphy <christian.murphy.42@gmail.com>
Reviewed-by: Titus Wormer <tituswormer@gmail.com>

Author: remcohaszing

index.js

@@ -4,8 +4,8 @@
  * @typedef {import('mdast-util-to-markdown').Options} ToMarkdownExtension
  * @typedef {import('mdast-util-to-markdown').Handle} ToMarkdownHandle
  * @typedef {import('estree-jsx').Program} Program
- * @typedef {import('./complex-types').MdxFlowExpression} MdxFlowExpression
- * @typedef {import('./complex-types').MdxTextExpression} MdxTextExpression
+ * @typedef {import('./complex-types.js').MdxFlowExpression} MdxFlowExpression
+ * @typedef {import('./complex-types.js').MdxTextExpression} MdxTextExpression
  */
 
 /**

tsconfig.json

@@ -3,8 +3,7 @@
   "compilerOptions": {
     "target": "ES2020",
     "lib": ["ES2020"],
-    "module": "ES2020",
-    "moduleResolution": "node",
+    "module": "Node16",
     "allowJs": true,
     "checkJs": true,
     "declaration": true,