v0.3.1

MQTTClient v0.3.1

Diff since v0.3.0

Improved Testing and CI.

Changes

• created mock broker
• update precomp ext using mock broker
• update tests using mock broker
• update ci to auto format with blue style
• changed MQTTConnection to Connection and made it a struct.
  • MakeConnection behaves the same

Merged pull requests:

• Create a Mock Broker (#12) (@NickMcSweeney)