fix(deps): bump proj4 from 2.11.0 to 2.12.0

Bumps [proj4](https://github.com/proj4js/proj4js) from 2.11.0 to 2.12.0.
- [Release notes](https://github.com/proj4js/proj4js/releases)
- [Changelog](https://github.com/proj4js/proj4js/blob/master/changelog.md)
- [Commits](proj4js/proj4js@2.11.0...2.12.0)

---
updated-dependencies:
- dependency-name: proj4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -40,7 +40,7 @@
     "morgan": "1.10.0",
     "pbf": "4.0.1",
     "pmtiles": "3.0.7",
-    "proj4": "2.11.0",
+    "proj4": "2.12.0",
     "sanitize-filename": "1.6.3",
     "sharp": "0.33.4",
     "tileserver-gl-styles": "2.0.0"