v0.0.2-post1

What's Changed

• Update documents, including README and function comments.
• Add file utilities.
• Add jsonl_to_json, jsonl_to_json, write_json_file and load_json_file in json utilities.
• Re-export all the utilities in __init__.py.

Full Changelog: https://github.com/wangzhen0518/bsutils/commits/v0.0.2-post1