Add header to assertsharp definition

assertsharp/assertsharp.d.ts

@@ -1,3 +1,8 @@
+// Type definitions for assertsharp
+// Project: https://www.npmjs.com/package/assertsharp
+// Definitions by: Bruno Leonardo Michels <https://github.com/brunolm>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
 declare module "assertsharp" {
     export default class Assert {
         static AreEqual<T>(expected: T, actual: T, message?: string): void;