build: Bump angular from 11 to 12

package.json

@@ -26,6 +26,7 @@
     "deepmerge": "^4.2.2",
     "geostyler-legend": "^2.1.1",
     "geostyler-openlayers-parser": "^3.0.0",
+    "geostyler-qgis-parser": "^1.0.0",
     "geostyler-sld-parser": "^3.0.1",
     "geostyler-style": "^5.0.0",
     "geotiff": "^1.0.8",
@@ -38,6 +39,8 @@
     "ngx-cookie-service": "^12.0.3",
     "ol": "^6.9.0",
     "ol-popup": "^4.0.0",
+    "polygon-clipping": "^0.15.3",
+    "polygon-splitter": "^0.0.7",
     "primeicons": "^4.1.0",
     "primeng": "^12.2.0",
     "proj4": "^2.7.5",