Bump rollup from 2.10.7 to 2.10.9 in /app

Bumps [rollup](https://github.com/rollup/rollup) from 2.10.7 to 2.10.9.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.10.7...v2.10.9)

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

app/package-lock.json

@@ -239,9 +239,9 @@
       }
     },
     "rollup": {
-      "version": "2.10.7",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.10.7.tgz",
-      "integrity": "sha512-rofUSH2i4GymWhQq6bfRaSiVbz4LEB4h/7+AhuXCaeOSwQqClD0hINjs59j8SyfQwcqe83NcVJAY2kjp0h33bQ==",
+      "version": "2.10.9",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.10.9.tgz",
+      "integrity": "sha512-dY/EbjiWC17ZCUSyk14hkxATAMAShkMsD43XmZGWjLrgFj15M3Dw2kEkA9ns64BiLFm9PKN6vTQw8neHwK74eg==",
       "dev": true,
       "requires": {
         "fsevents": "~2.1.2"

app/package.json

@@ -14,6 +14,6 @@
   "license": "ISC",
   "devDependencies": {
     "jshint": "^2.11.1",
-    "rollup": "^2.10.7"
+    "rollup": "^2.10.9"
   }
 }