update changelog

CHANGES.rst

@@ -1,18 +1,18 @@
 Changelog
 =========
 
-2.4 - July 18, 2020
+2.4 - Nov 23, 2020
 -------------------
 
-* Use poetry for for building this project
+* Support poetry for for building this project
 
 * Use secrets.SysRandom instead of random.SystemRandom if possible
 
 * `.get` on Packets has an optional default parameter (to mimic dict.get())
 
 * Fix: digestmod is not optional in python3.8 anymore
 
-* Fix: authenthicator was refreshed before the packet was generated
+* Fix: authenticator was refreshed before the packet was generated
 
 * Fix bug causing Message-Authenticator verification to fail if
   multiple instances of an attribute do not appear sequentially in
@@ -21,7 +21,7 @@ Changelog
 * Fixed #140 VerifyReply broken when multiple instances of same attribute are
   not adjacent on reply
 
-* Fixed #135 Missing send_packet for asyn Client
+* Fixed #135 Missing send_packet for async Client
 
 * Fixed #126 python3 support for SaltCrypt
   (was previously broken)