add mac app icon (#774)

katrain/__main__.py

@@ -22,7 +22,10 @@ kivy.require("2.0.0")
 from katrain.core.utils import find_package_resource, PATHS
 from kivy.config import Config
 
-ICON = find_package_resource("katrain/img/icon.ico")
+if kivy_platform == "macosx":
+    ICON = find_package_resource("katrain/img/icon.icns")
+else:
+    ICON = find_package_resource("katrain/img/icon.ico")
 Config.set("kivy", "window_icon", ICON)
 Config.set("input", "mouse", "mouse,multitouch_on_demand")
 

spec/KaTrain.spec

@@ -220,7 +220,7 @@ else:
         app = BUNDLE(
             coll,
             name='KaTrain.app',
-            icon=f'{base_path}/img/icon.ico',
+            icon=f'{base_path}/img/icon.icns',
             bundle_identifier='org.katrain.KaTrain',
             version=app_version,
             info_plist={