Fix for eyes module API

eyes/eyes-tests.ts

@@ -26,4 +26,9 @@ var options = {
     hideFunctions: true,  
     stream: process.stdout,
     maxLength: 120
-}
+}
+
+var result = eyes.inspector(testObj)
+
+
+

eyes/eyes.d.ts

@@ -13,7 +13,7 @@ declare module "eyes"
     export function inspect(thing:any, label?:string): void;
 
     export interface InspectorFunction {
-        (thing:any, label?:string): void;
+        (thing:any, label?:string): string;
     }
 
     export interface EyesOptions