chore(deps): bump proj4 in the production-dependencies group

Bumps the production-dependencies group with 1 update: [proj4](https://github.com/proj4js/proj4js).


Updates `proj4` from 2.14.0 to 2.15.0
- [Release notes](https://github.com/proj4js/proj4js/releases)
- [Changelog](https://github.com/proj4js/proj4js/blob/master/changelog.md)
- [Commits](proj4js/proj4js@v2.14.0...v2.15.0)

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

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

packages/winnow/package.json

@@ -64,7 +64,7 @@
     "moment": "^2.30.1",
     "murmurhash": "^2.0.1",
     "ngeohash": "^0.6.3",
-    "proj4": "^2.14.0",
+    "proj4": "^2.15.0",
     "simple-statistics": "^7.8.7",
     "wkt-parser": "^1.4.0"
   },