update sbt-scoverage to 2.3.0 and sbt-coveralls to 1.3.15

Author: mr-git

project/plugins.sbt

@@ -1,6 +1,6 @@
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.0.6")
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.3.0")
 
-addSbtPlugin("org.scoverage" % "sbt-coveralls" % "1.3.2")
+addSbtPlugin("org.scoverage" % "sbt-coveralls" % "1.3.15")
 
 addSbtPlugin("com.github.sbt" % "sbt-dynver" % "5.1.0")