Bump version number

Author: mikaem

shenfun/__init__.py

@@ -29,7 +29,7 @@
 """
 #pylint: disable=wildcard-import,no-name-in-module
 
-__version__ = '4.2.1'
+__version__ = '4.2.2'
 __author__ = 'Mikael Mortensen'
 
 import numpy as np