fix d.ts breaking (#519)

Author: kazupon

package.json

@@ -20,7 +20,7 @@
     "build:size-core": "rollup -c packages/size-check-core/rollup.config.js",
     "build:size-vue-i18n": "rollup -c packages/size-check-vue-i18n/rollup.config.js",
     "build:sourcemap": "yarn build --sourcemap",
-    "build:type": "yarn build --types && tail -n +22 ./packages/vue-i18n/src/vue.d.ts >> ./packages/vue-i18n/dist/vue-i18n.d.ts",
+    "build:type": "yarn build --types && tail -n +32 ./packages/vue-i18n/src/vue.d.ts >> ./packages/vue-i18n/dist/vue-i18n.d.ts",
     "clean": "npm-run-all --parallel clean:*",
     "clean:cache": "yarn clean:cache:jest",
     "clean:cache:jest": "jest --clearCache",