Update changelog

Author: mvantellingen

CHANGES

@@ -1,3 +1,15 @@
+4.2.0 (2022-111-03)
+-------------------
+ - Drop support for Python 3.6
+ - Allow embedding CDATA elements in simple types (#1339)
+ - Allow to pass in a pre parsed Document (#1330)
+ - Fix httpx DeprecationWarning for post data (#1326)
+ - Add BinaryMemorySignature (#1300)
+ - Fix IndexError when empty body response (#1287)
+ - Add support for context manager on Client (#1166)
+ - Allow Ws Addressing plugin to use a different URL (#1328)
+
+
 4.1.0 (2021-08-15)
 ------------------
  - Remove last dependency on `six` (#1250)