fix(ol-style-icon): allow to pass either scale or width/height property

BREAKING CHANGE: **`ol-style-icon`**: the property `scale` has no longer a default of `1`. Please pass a value of one explicitly if needed. The change was needed since the underlying OpenLayers lib want's to either have a `scale` defined or  `width`/`height`. Before it wasn't possible to define an icon by `width`/`height` since the `scale` was set by default.

closes #288

Author: d-koppenhagen

Diff for: src/components/styles/OlStyleIcon.vue

@@ -17,7 +17,6 @@ const props = withDefaults(defineProps<Options>(), {
   displacement: () => [0, 0],
   offsetOrigin: "top-left",
   opacity: 1,
-  scale: 1,
   rotateWithView: false,
   rotation: 0,
 });