Build(deps): bump vue-demi from 0.13.7 to 0.13.8

Bumps [vue-demi](https://github.com/antfu/vue-demi) from 0.13.7 to 0.13.8.
- [Release notes](https://github.com/antfu/vue-demi/releases)
- [Commits](https://github.com/antfu/vue-demi/compare/v0.13.7...v0.13.8)

package.json

@@ -43,7 +43,7 @@
     "nuxt-edge": "latest",
     "sass-loader": "^10.1.1",
     "vue": "2.7.8",
-    "vue-demi": "^0.13.7",
+    "vue-demi": "^0.13.8",
     "vue-numeral-filter": "^2.2.0",
     "vue-server-renderer": "2.7.8",
     "vue-template-compiler": "2.7.8",