[logback-dev] [qos-ch/logback] 4ef008: set slf4j.version to 1.7.18

[Ceki Gulcu]

  Branch: refs/heads/master
  Home:   https://github.com/qos-ch/logback
  Commit: 4ef008efa3e0550d6548343569f46a231ee06b27
      https://github.com/qos-ch/logback/commit/4ef008efa3e0550d6548343569f46a231ee06b27
  Author: Ceki Gulcu <ceki at qos.ch>
  Date:   2016-02-27 (Sat, 27 Feb 2016)

  Changed paths:
    M pom.xml

  Log Message:
  -----------
  set slf4j.version to 1.7.18