chore(deps-dev): bump flatted from 3.3.3 to 3.4.3

Bumps [flatted](https://github.com/WebReflection/flatted) from 3.3.3 to 3.4.3.
- [Commits](https://github.com/WebReflection/flatted/compare/v3.3.3...v3.4.3)

---
updated-dependencies:
- dependency-name: flatted
  dependency-version: 3.4.3
  dependency-type: indirect
...

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

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "librespeed-speedtest",
-  "version": "6.0.1",
+  "version": "6.2.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "librespeed-speedtest",
-      "version": "6.0.1",
+      "version": "6.2.0",
       "license": "LGPL-3.0-or-later",
       "devDependencies": {
         "@playwright/test": "^1.55.0",
@@ -618,9 +618,9 @@
       }
     },
     "node_modules/flatted": {
-      "version": "3.3.3",
-      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.3.3.tgz",
-      "integrity": "sha512-GX+ysw4PBCz0PzosHDepZGANEuFCMLrnRTiEy9McGjmkCQYwRq4A/X786G/fjM/+OjsWSU1ZrY5qyARZmO/uwg==",
+      "version": "3.4.3",
+      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.4.3.tgz",
+      "integrity": "sha512-/zipXxyO6rGvuNGDiULY9MvEGSkb2gaG4GGH4ygMi0ZZzyMHdUZBmntJmx5x1G2VuPytCwGN4xsJP6cw+sK+vQ==",
       "dev": true,
       "license": "ISC"
     },