Update sbt-coveralls to 1.3.15#679

aiven-scala-steward[bot] wants to merge 1 commit intomainAiven-Open/guardian-for-apache-kafka:mainfrom

update/sbt-coveralls-1.3.15Aiven-Open/guardian-for-apache-kafka:update/sbt-coveralls-1.3.15Copy head branch name to clipboard