v1.2.1: Add sample codes in documentation for service classes (#7)

Includes new documentation with sample codes

v1.2.0

What's Changed

• Update readme, include code examples by @devwaseem in #2
• Update README to add sample codes by @devwaseem in #3
• Update README.md by @devwaseem in #4
• Update MTLiveMailService.swift by @devwaseem in #5

Full Changelog: v1.1.1...v1.2.0

v1.1.1

What's Changed

• Create LICENSE by @devwaseem in #1
• Update print messages for MTLiveMessagesService

Full Changelog: v0.1.2-alpha...v1.1.1

v1.1

• Add documentation
• Remove useless pubic accessors

Initial release

v1.0

Fix documentation references

v0.1.2-alpha

Support unique ID for `MTAttachment`

v0.1.1-alpha

Remove print from `MTLiveMessagesService.onMessage(eventType:messageE…

Initial release

Initial commit

- Added neccessary code for accessing `mail.tm` api
- Added support for Combine