fix: random color generation

src/app.service.ts

@@ -1,4 +1,4 @@
-import * as hsv2rgb from 'hsv2rgb';
+import hsv2rgb from 'hsv2rgb';
 import {Feature} from 'ol';
 import {Fill, Stroke, Style} from 'ol/style';
 import {GeoJSON} from 'ol/format';