Update sbt-scoverage
Add logger config to suppress the message "There is no conversion class registered for conversion word [coloredLevel]"
Do not log into application.log to prevent for "java.io.IOException: Stream Closed" exception

@see https://travis-ci.org/mohiva/play-silhouette/builds/27015707#L3724
Merge pull request #167 from akkie/master

Update sbt-scoverage