add blob-polyfill, minor fix

package.json

@@ -35,6 +35,7 @@
     "@vitest/coverage-c8": "^0.27.2",
     "@vue/eslint-config-standard": "^8.0.1",
     "@vue/test-utils": "^2.2.7",
+    "blob-polyfill": "^7.0.20220408",
     "eslint": "^8.27.0",
     "eslint-config-prettier": "^8.5.0",
     "eslint-plugin-nuxt": "^4.0.0",