Bugfix: Make leaflet-heatmap a regular dependency, not a dev dependency

package.json

@@ -25,6 +25,7 @@
 		"leaflet-fullscreen": "^1.0.2",
 		"leaflet-timedimension": "^1.1.0",
 		"leaflet.markercluster": "^1.4.1",
+		"leaflet-heatmap": "^1.0.0",
 		"moment": "^2.24.0",
 		"nanomodal": "^5.1.1",
 		"smartsettings": "^1.2.3",
@@ -34,7 +35,6 @@
 		"@types/chart.js": "^2.7.51",
 		"@types/leaflet": "^1.4.4",
 		"@types/leaflet-fullscreen": "^1.0.4",
-		"leaflet-heatmap": "^1.0.0",
 		"nightdocs": "^1.0.4",
 		"postcss-copy": "^7.1.0",
 		"postcss-import": "^12.0.1",