Bump vue from 2.5.19 to 2.5.20 in /apps/updatenotification

Bumps [vue](https://github.com/vuejs/vue) from 2.5.19 to 2.5.20.
- [Release notes](https://github.com/vuejs/vue/releases)
- [Commits](https://github.com/vuejs/vue/compare/v2.5.19...v2.5.20)

Signed-off-by: dependabot[bot] <support@dependabot.com>

apps/updatenotification/package-lock.json

@@ -4372,9 +4372,9 @@
       }
     },
     "vue": {
-      "version": "2.5.19",
-      "resolved": "https://registry.npmjs.org/vue/-/vue-2.5.19.tgz",
-      "integrity": "sha512-zs7w/dy/yMTCcUunUl05UHhYEI2bt67R7G2jD42HnJ28JxCtC1FY8zZ9GU4PF2SJP8Ff/B9HyojWk/NztqKfFA=="
+      "version": "2.5.20",
+      "resolved": "https://registry.npmjs.org/vue/-/vue-2.5.20.tgz",
+      "integrity": "sha512-kVLZi8RWOk8qwAt+a0bVDy9VV5Zzcnj0fLCMyKLx1dmEBjqmYJYRWHvPwiypiJBtJkdmROy5NP5hyDqTdfBcvQ=="
     },
     "vue-click-outside": {
       "version": "1.0.7",

apps/updatenotification/package.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "nextcloud-vue": "^0.4.5",
     "v-tooltip": "^2.0.0-rc.33",
-    "vue": "^2.5.19",
+    "vue": "^2.5.20",
     "vue-click-outside": "^1.0.7"
   },
   "devDependencies": {