Small update

Updated package version to 3.0.0!

- Fixed some bugs
- Added html prop to Mail class (if it's not cached)
- Changed code style
- Updated package versions
- Changed typescript annotations
- And some other changes

Upgraded to 2.1.0

1. Fixed Event Emitter bug.\n2. Fixed "This account no longer exists" error\n3. Fixed some bugs

Removed console log

Update package.json

Version 2.0

- Added download email
- Fixed bugs
- Fixed axios bug
- And more

Added License