v0.6.0

decomposition to modules
remove typing dependency
add MailMessage.cc, MailMessage.bcc attrs
specify custom classes email_message_class directly
MailBox._uid_str change type check logic
!!! Change MailMessage attr return types: lists -> tuples
MailBox.fetch add mark_seen param
fix MailMessage.from_ bug when empty

v0.5

new MailMessage.uid parse logic
functools.lru_cache for MailMessage properties
MailMessage.get_attachments() -> MailMessage.attachments
fix setuptools

more stable, more convenient

v0.4

fix _decode_value for unknown encoding; fix _parse_email_address

v0.2.0

readme minor fix