Bump portal-vue from 2.1.6 to 2.1.7

Bumps [portal-vue](https://github.com/LinusBorg/portal-vue) from 2.1.6 to 2.1.7.
- [Release notes](https://github.com/LinusBorg/portal-vue/releases)
- [Commits](LinusBorg/portal-vue@2.1.6...2.1.7)

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

package.json

@@ -28,7 +28,7 @@
     "mutationobserver-shim": "^0.3.3",
     "node-sass": "^4.12.0",
     "popper.js": "^1.16.1",
-    "portal-vue": "^2.1.4",
+    "portal-vue": "^2.1.7",
     "sass-loader": "^7.1.0",
     "vue-cli-plugin-bootstrap-vue": "^0.5.0",
     "vue-template-compiler": "^2.6.10"