chore: release 3.3

- update changes
- update version
diff --git a/serial/__init__.py b/serial/__init__.py
index 4cd3a25..64c43c1 100644
--- a/serial/__init__.py
+++ b/serial/__init__.py
@@ -3,7 +3,7 @@
 # This is a wrapper module for different platform implementations
 #
 # This file is part of pySerial. https://github.com/pyserial/pyserial
-# (C) 2001-2016 Chris Liechti <cliechti@gmx.net>
+# (C) 2001-2017 Chris Liechti <cliechti@gmx.net>
 #
 # SPDX-License-Identifier:    BSD-3-Clause
 
@@ -13,7 +13,7 @@
 from serial.serialutil import *
 #~ SerialBase, SerialException, to_bytes, iterbytes
 
-__version__ = '3.2.1'
+__version__ = '3.3'
 
 VERSION = __version__