Bump vue-server-renderer from 2.7.14 to 2.7.15

Bumps [vue-server-renderer](https://github.com/vuejs/vue) from 2.7.14 to 2.7.15.
- [Release notes](https://github.com/vuejs/vue/releases)
- [Changelog](https://github.com/vuejs/vue/blob/main/CHANGELOG.md)
- [Commits](vuejs/vue@v2.7.14...v2.7.15)

---
updated-dependencies:
- dependency-name: vue-server-renderer
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -25,7 +25,7 @@
     "papaparse": "^5.4.1",
     "vue": "^2.6.14",
     "vue-select": "^3.20.2",
-    "vue-server-renderer": "^2.6.14",
+    "vue-server-renderer": "^2.7.15",
     "vue-template-compiler": "^2.6.14",
     "webpack": "^4.47.0"
   },