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__
 
diff --git a/serial/serialposix.py b/serial/serialposix.py
index cff3417..bb2fa03 100644
--- a/serial/serialposix.py
+++ b/serial/serialposix.py
@@ -302,7 +302,7 @@
         """Set communication parameters on opened port."""
         if self.fd is None:
             raise SerialException("Can only operate on a valid file descriptor")
-            
+
         # if exclusive lock is requested, create it before we modify anything else
         if self._exclusive is not None:
             if self._exclusive:
@@ -312,7 +312,7 @@
                     raise SerialException(msg.errno, "Could not exclusively lock port {}: {}".format(self._port, msg))
             else:
                 fcntl.flock(self.fd, fcntl.LOCK_UN)
-            
+
         custom_baud = None
 
         vmin = vtime = 0                # timeout is done via select
diff --git a/serial/serialutil.py b/serial/serialutil.py
index 322b7e3..e4df90f 100644
--- a/serial/serialutil.py
+++ b/serial/serialutil.py
@@ -227,7 +227,7 @@
         self.dsrdtr = dsrdtr
         self.inter_byte_timeout = inter_byte_timeout
         self.exclusive = exclusive
-        
+
         # watch for backward compatible kwargs
         if 'writeTimeout' in kwargs:
             self.write_timeout = kwargs.pop('writeTimeout')
@@ -312,7 +312,7 @@
     def exclusive(self):
         """Get the current exclusive access setting."""
         return self._exclusive
-    
+
     @exclusive.setter
     def exclusive(self, exclusive):
         """Change the exclusive access setting."""