Types for structured receiber

Signed-off-by: Fabio José <fabiojose@gmail.com>

v1/index.d.ts

@@ -56,6 +56,14 @@ export class BinaryHTTPEmitter {
   public emit(event: Cloudevent): Promise<any>;
 }
 
+/**
+ * HTTP receiver for Structured mode
+ */
+export class StructuredHTTPReceiver {
+  public check(payload: any, headers: Map<String, String>): void;
+  public parse(payload: any, headers: Map<String, String>): Cloudevent;
+}
+
 /**
  * Function to create CloudEvents instances
  */