add auto updater

src/shared/settings.d.ts

@@ -22,8 +22,6 @@ export interface Settings {
     clickTrayToShowHide?: boolean;
     customTitleBar?: boolean;
 
-    checkUpdates?: boolean;
-
     splashTheming?: boolean;
     splashColor?: string;
     splashBackground?: string;
@@ -49,7 +47,6 @@ export interface State {
     windowBounds?: Rectangle;
     displayid: int;
 
-    skippedUpdate?: string;
     firstLaunch?: boolean;
 
     steamOSLayoutVersion?: number;