Add todo for classes to be final as of next major version

Author: sagikazarmark

src/BatchClient.php

@@ -13,6 +13,8 @@
  * This implementation simply loops over the requests and uses sendRequest with each of them.
  *
  * @author Joel Wurtz <[email protected]>
+ *
+ * TODO: make class final in version 2.0.
  */
 class BatchClient implements HttpClient
 {

src/EmulatedHttpAsyncClient.php

@@ -11,6 +11,8 @@
  * This should be replaced by an anonymous class in PHP 7.
  *
  * @author Márk Sági-Kazár <[email protected]>
+ *
+ * TODO: make class final in version 2.0.
  */
 class EmulatedHttpAsyncClient implements HttpClient, HttpAsyncClient
 {

src/EmulatedHttpClient.php

@@ -11,6 +11,8 @@
  * This should be replaced by an anonymous class in PHP 7.
  *
  * @author Márk Sági-Kazár <[email protected]>
+ *
+ * TODO: make class final in version 2.0.
  */
 class EmulatedHttpClient implements HttpClient, HttpAsyncClient
 {

src/HttpMethodsClient.php

@@ -23,6 +23,8 @@
  *
  * @author Márk Sági-Kazár <[email protected]>
  * @author David Buchmann <[email protected]>
+ *
+ * TODO: make class final in version 2.0.
  */
 class HttpMethodsClient implements HttpClient
 {