Change logger for linux and windows to var

Sources/AppDependency/Application/Application.swift

@@ -16,7 +16,7 @@ open class Application: NSObject {
     public static let logger: Logger = Logger(subsystem: "AppDependency", category: "Application")
     #else
     /// Logger specifically for AppDependency
-    public static let logger: ApplicationLogger = ApplicationLogger()
+    public static var logger: ApplicationLogger = ApplicationLogger()
     #endif
 
     static var isLoggingEnabled: Bool = false