Bump vue and vue-template-compiler

Bumps [vue](https://github.com/vuejs/vue) and [vue-template-compiler](https://github.com/vuejs/vue). These dependencies needed to be updated together.

Updates `vue` from 2.5.22 to 2.6.1
- [Release notes](https://github.com/vuejs/vue/releases)
- [Commits](vuejs/vue@v2.5.22...v2.6.1)

Updates `vue-template-compiler` from 2.5.22 to 2.6.1
- [Release notes](https://github.com/vuejs/vue/releases)
- [Commits](vuejs/vue@v2.5.22...v2.6.1)

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

package.json

@@ -22,10 +22,10 @@
     "css-loader": "^2.1.0",
     "jquery": "^3.3.1",
     "nextcloud_fetch": "^2.1.0",
-    "vue": "^2.5.22",
+    "vue": "^2.6.1",
     "vue-loader": "^15.6.2",
     "vue-style-loader": "^4.1.2",
-    "vue-template-compiler": "^2.5.22"
+    "vue-template-compiler": "^2.6.1"
   },
   "devDependencies": {
     "webpack": "^4.29.1",