fix: getDevicePixelRatio will return 0 on Linux resulting in no minimap

Author: aminya

lib/minimap.js

@@ -860,7 +860,14 @@ export default class Minimap {
    * @returns {number} The devicePixelRatio in the Minimap
    */
   getDevicePixelRatio() {
-    return this.getDevicePixelRatioRounding() ? Math.floor(devicePixelRatio) : devicePixelRatio
+    if (this.getDevicePixelRatioRounding()) {
+      if (devicePixelRatio >= 0.5) {
+        return Math.round(devicePixelRatio)
+      } else {
+        return Math.round(devicePixelRatio * 10) / 10
+      }
+    }
+    return devicePixelRatio
   }
 
   /**