use postbuild and declaration

packages/remark-growi-directive/package.json

@@ -17,7 +17,9 @@
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "scripts": {
+    "cp:declaration": "cp -RT ./src/mdast-util-growi-directive/index.d.ts ./dist/mdast-util-growi-directive/index.d.ts",
     "build": "yarn tsc -p tsconfig.build.json",
+    "postbuild": "yarn cp:declaration",
     "clean": "shx rm -rf dist",
     "dev": "yarn build",
     "watch": "yarn tsc -w",

packages/remark-growi-directive/src/mdast-util-growi-directive/index.js

@@ -1,8 +1,2 @@
 export { directiveFromMarkdown, directiveToMarkdown } from './lib/index.js';
 export { DirectiveType as DirectiveTypeObject } from './lib/index.js';
-export {
-  LeafGrowiPluginDirective,
-  TextGrowiPluginDirective,
-  LeafGrowiPluginDirectiveData,
-  TextGrowiPluginDirectiveData,
-} from './index';