Update util.inspect API.

Latest API has an options object as the second parameter
instead of separate parameters. The old API is still supported
so have added the new signature as an overload.

Updated node-tests.ts

node/node.d.ts

@@ -1074,6 +1074,13 @@ declare module "stream" {
 }
 
 declare module "util" {
+    export interface InspectOptions {
+        showHidden?: boolean;
+        depth?: number;
+        colors?: boolean;
+        customInspect?: boolean;
+    }
+
     export function format(format: any, ...param: any[]): string;
     export function debug(string: string): void;
     export function error(...param: any[]): void;
@@ -1081,6 +1088,7 @@ declare module "util" {
     export function print(...param: any[]): void;
     export function log(string: string): void;
     export function inspect(object: any, showHidden?: boolean, depth?: number, color?: boolean): string;
+    export function inspect(object: any, options: InspectOptions): string;
     export function isArray(object: any): boolean;
     export function isRegExp(object: any): boolean;
     export function isDate(object: any): boolean;