Prepare release for pypi by incrementing version to 0.3

Author: j-c-cook

setup.py

@@ -23,7 +23,7 @@
       download_url='https://github.com/j-c-cook/ghedt/archive/v0.2.tar.gz',
       long_description=long_description,
       long_description_content_type='text/markdown',
-      version='0.2',
+      version='0.3',
       packages=find_packages(),
       include_package_data=True,
       author='Jack C. Cook',