3.2.0

Changelog (since phobetor/rabbitmq-supervisor-bundle@3.1.0)

• add property configuration: user #57 ( thx @zabroc )
• add property configuration: startretries #58 ( thx @6ecuk ) (resolves #49)
• allow configuration of 0 workers #56 ( thx @coExp ) (resolves #59)
• add configuration of socket file permissions #63 ( thx @lushc )
• fix symfony 4 deprecations #62 ( thx @rmikalkenas, @coudenysj )