Pass query parameters as an object

Query parameters should now be passed as an object instead of key/value pairs, see https://github.com/chaijs/chai-http/pull/33 for details

chai-http/chai-http.d.ts

@@ -41,7 +41,7 @@ declare module chaiHttp {
 		attach(field: string, file: string, filename: string): Request;
 		attach(field: string, file: Buffer, filename: string): Request;
 		set(field: string, val: string): Request;
-		query(key: string, value: string): Request;
+		query(params: Object): Request;
 		send(data: Object): Request;
 		auth(user: string, name: string): Request;
 		field(name: string, val: string): Request;