v0.0.4

• Fixed dill's version to 0.3.4 (include major business logic changes in dill 0.3.5 or later, which will cause error #1, so 0.3.4 is the last usable version based on original code)
• Last version supporting python3.6, which will be deprecated in next version.

Full Changelog: v0.0.3...v0.0.4