fix(deps): update dependency @nuxtjs/composition-api to v0.26.0

Author: renovate-bot

package.json

@@ -4,7 +4,7 @@
   "version": "2.15.7",
   "private": true,
   "dependencies": {
-    "@nuxtjs/composition-api": "0.25.1",
+    "@nuxtjs/composition-api": "0.26.0",
     "nuxt-property-decorator": "2.9.1",
     "nuxt": "2.15.7"
   },