chore: add missing files into package

Author: plainheart

index.d.ts

@@ -0,0 +1 @@
+export * from './types'

package.json

@@ -8,6 +8,10 @@
     "dist",
     "src",
     "index.js",
+    "index.d.ts",
+    "export.js",
+    "export.d.ts",
+    "types.d.ts",
     "examples/*.html"
   ],
   "types": "types.d.ts",