Bump path-to-regexp from 1.8.0 to 1.9.0 in /frontend

Bumps [path-to-regexp](https://github.com/pillarjs/path-to-regexp) from 1.8.0 to 1.9.0.
- [Release notes](https://github.com/pillarjs/path-to-regexp/releases)
- [Changelog](https://github.com/pillarjs/path-to-regexp/blob/master/History.md)
- [Commits](https://github.com/pillarjs/path-to-regexp/compare/v1.8.0...v1.9.0)

---
updated-dependencies:
- dependency-name: path-to-regexp
  dependency-type: indirect
...

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

README.md

@@ -1,10 +1,10 @@
 # Photos
 
 Something that tries to be a self-hosted alternative to Google Photos
-
+<!---
 Demo: https://photos.usatiuk.com
 (no need to enter a real email, something like asdf@asdf.com is enough, data is stored on tmpfs, reset every day)
-
+-->
 ![screenshot](docs/s1.png)
 
 ## Getting started

frontend/package-lock.json

@@ -9255,9 +9255,9 @@
             "integrity": "sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw=="
         },
         "node_modules/path-to-regexp": {
-            "version": "1.8.0",
-            "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-1.8.0.tgz",
-            "integrity": "sha512-n43JRhlUKUAlibEJhPeir1ncUID16QnEjNpwzNdO3Lm4ywrBpBZ5oLD0I6br9evr1Y9JTqwRtAh7JLoOzAQdVA==",
+            "version": "1.9.0",
+            "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-1.9.0.tgz",
+            "integrity": "sha512-xIp7/apCFJuUHdDLWe8O1HIkb0kQrOMb/0u6FXQjemHn/ii5LrIzU6bdECnsiTF/GjZkMEKg1xdiZwNqDYlZ6g==",
             "dependencies": {
                 "isarray": "0.0.1"
             }