Fix notification icon: add all explicit iOS icon sizes to asset catalog

Single-size universal entry was not generating 20pt notification sizes.
Added all traditional sizes (20/29/40/60/76/83.5pt) so iOS notification
center finds the pre-baked icon directly.

Co-Authored-By: Kutesir <tqwyy79vzn@privaterelay.appleid.com>

KisaniCal/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,10 +1,17 @@
 {
   "images" : [
-    {
-      "idiom" : "universal",
-      "platform" : "ios",
-      "size" : "1024x1024"
-    }
+    { "filename" : "AppIcon-20@2x.png",   "idiom" : "iphone", "scale" : "2x", "size" : "20x20"   },
+    { "filename" : "AppIcon-20@3x.png",   "idiom" : "iphone", "scale" : "3x", "size" : "20x20"   },
+    { "filename" : "AppIcon-29@2x.png",   "idiom" : "iphone", "scale" : "2x", "size" : "29x29"   },
+    { "filename" : "AppIcon-29@3x.png",   "idiom" : "iphone", "scale" : "3x", "size" : "29x29"   },
+    { "filename" : "AppIcon-40@2x.png",   "idiom" : "iphone", "scale" : "2x", "size" : "40x40"   },
+    { "filename" : "AppIcon-40@3x.png",   "idiom" : "iphone", "scale" : "3x", "size" : "40x40"   },
+    { "filename" : "AppIcon-60@2x.png",   "idiom" : "iphone", "scale" : "2x", "size" : "60x60"   },
+    { "filename" : "AppIcon-60@3x.png",   "idiom" : "iphone", "scale" : "3x", "size" : "60x60"   },
+    { "filename" : "AppIcon-76@1x.png",   "idiom" : "ipad",   "scale" : "1x", "size" : "76x76"   },
+    { "filename" : "AppIcon-76@2x.png",   "idiom" : "ipad",   "scale" : "2x", "size" : "76x76"   },
+    { "filename" : "AppIcon-83.5@2x.png", "idiom" : "ipad",   "scale" : "2x", "size" : "83.5x83.5" },
+    { "filename" : "AppIcon-1024.png",    "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" }
   ],
   "info" : {
     "author" : "xcode",