Build(deps): bump vue-demi from 0.13.6 to 0.13.7

Bumps [vue-demi](https://github.com/antfu/vue-demi) from 0.13.6 to 0.13.7.
- [Release notes](https://github.com/antfu/vue-demi/releases)
- [Commits](https://github.com/antfu/vue-demi/compare/v0.13.6...v0.13.7)

package.json

@@ -44,7 +44,7 @@
     "nuxt": "^2.15.8",
     "sass-loader": "^10.1.1",
     "vue": "2.7.8",
-    "vue-demi": "^0.13.6",
+    "vue-demi": "^0.13.7",
     "vue-numeral-filter": "^2.2.0",
     "vue-server-renderer": "2.7.8",
     "vue-template-compiler": "2.7.8",