bump version number

setup.py

@@ -3,7 +3,7 @@
 from setuptools import setup, find_packages
 
 setup(name='fdfd_tools',
-      version='0.3',
+      version='0.4',
       description='FDFD Electromagnetic simulation tools',
       author='Jan Petykiewicz',
       author_email='anewusername@gmail.com',