fix(vitest-plugin): ensure typings are found when using exports

Fix #34

Author: adriencaccia

packages/vitest-plugin/package.json

@@ -12,6 +12,7 @@
   "types": "./dist/index.d.ts",
   "exports": {
     ".": {
+      "types": "./dist/index.d.ts",
       "import": "./dist/index.mjs"
     }
   },