Update VError constructor

VError constructor can be called with no arguments

types/verror/index.d.ts

@@ -31,6 +31,7 @@ declare class VError extends Error {
     cause(): Error | undefined;
     constructor(options: VError.Options | Error, message: string, ...params: any[]);
     constructor(message: string, ...params: any[]);
+    constructor();
 }
 
 declare namespace VError {