Fix: S3Client.get_tasks (#50)

Co-authored-by: Yuta Uchida <yuta.uchida.mar.sh.nat@gmail.com>

minor fix on pyproject.toml

Merge pull request #44 from hirosassa/python-39-support

Python 3.9 support and away with 3.6

Merge pull request #41 from m3dev/local_cache

[draft] add local cache

Merge pull request #38 from m3dev/not_found_log_files

add try catch

Merge pull request #34 from qqhann/update/ordered-task-id

Update clients to return tasks sorted by last modified

Merge pull request #32 from m3dev/top-k

add get_data top_k

fix path

update path method

update setup.py