Update package contents

Signed-off-by: moznion <moznion@mail.moznion.net>

Author: moznion

.npmignore

@@ -5,7 +5,9 @@
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "files": [
-    "dist",
+    "dist/*.js",
+    "dist/*.js.map",
+    "dist/*.d.ts",
     "LICENSE",
     "README.md",
     "package.json"