fix: upgrade proj4 from 2.17.0 to 2.19.4

Snyk has created this PR to upgrade proj4 from 2.17.0 to 2.19.4.

See this package in npm:
proj4

See this project in Snyk:
https://app.snyk.io/org/ahnan/project/61fe76dc-20a0-4426-a5a5-1699c7d53f2a?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package.json

@@ -169,7 +169,7 @@
     "node-forge": "^1.3.1",
     "ol": "10.5.0",
     "pbf": "3.2.1",
-    "proj4": "2.17.0",
+    "proj4": "2.19.4",
     "promise-polyfill": "8.2.3",
     "rbush": "^2.0.2",
     "three": "0.150.1",