0.4.0

• Support to report depth of failed jobs queue (#2)
• Support health checking (#3)

0.3.3

Fix handling of describing.

0.3.2

Refactor inner structure

0.3.1

Features

• Support to configure guard interval
• Support worker's status

0.3.0

Support processed count and failed count status

0.2.0

Prepend name space

0.1.0

• Change to use gauge for queue status
• Fix incorrect labbeling

0.0.1

Original version