Release v0.2.1

• Implement get all the events
• Implement get message by Ids
• Include example for each implementation
• Fix typos
• Now Dtos are inside of mailgun_api::api instead of root

Release v0.1.1

• Fix license description in Readme file
• Fix env file description in API docs and Readme file

Release 0.1.0

• Set mailgun parameters
• Implement send email