Investigate issue with Coveralls

[calvinlfer]

Adding coveralls to the build causes issues and is unable to build on JDK 11

      ...,
      WorkflowStep.Sbt(
        name = Option("Coverage"),
        commands = List("coverageAggregate"),
        cond = None,
        env = Map.empty
      ),
      WorkflowStep.Sbt(
        name = Option("Coveralls"),
        commands = List("coveralls"),
        cond = None,
        env = Map(
          "COVERALLS_REPO_TOKEN" -> "${{ secrets.GITHUB_TOKEN }}",
          "COVERALLS_FLAG_NAME"  -> "Scala ${{ matrix.scala }}"
        )
      )

[error] java.util.NoSuchElementException: key not found: 2/io/kaizensolutions/virgil/codecs/UdtValueEncoderMagnoliaDerivation.scala
[error]         at scala.collection.MapLike.default(MapLike.scala:236)
[error]         at scala.collection.MapLike.default$(MapLike.scala:235)
[error]         at scala.collection.AbstractMap.default(Map.scala:65)
[error]         at scala.collection.MapLike.apply(MapLike.scala:144)
[error]         at scala.collection.MapLike.apply$(MapLike.scala:143)
[error]         at scala.collection.AbstractMap.apply(Map.scala:65)
[error]         at org.scoverage.coveralls.CoberturaMultiSourceReader.lineCoverage(CoberturaMultiSourceReader.scala:119)
[error]         at org.scoverage.coveralls.CoberturaMultiSourceReader.reportForSource(CoberturaMultiSourceReader.scala:130)
[error]         at org.scoverage.coveralls.CoverallsPlugin$.$anonfun$coverallsTask$6(CoverallsPlugin.scala:128)
[error]         at scala.collection.parallel.AugmentedIterableIterator.map2combiner(RemainsIterator.scala:116)
[error]         at scala.collection.parallel.AugmentedIterableIterator.map2combiner$(RemainsIterator.scala:113)
[error]         at scala.collection.parallel.immutable.ParHashSet$ParHashSetIterator.map2combiner(ParHashSet.scala:81)
[error]         at scala.collection.parallel.ParIterableLike$Map.leaf(ParIterableLike.scala:1064)
[error]         at scala.collection.parallel.Task.$anonfun$tryLeaf$1(Tasks.scala:53)
[error]         at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
[error]         at scala.util.control.Breaks$$anon$1.catchBreak(Breaks.scala:67)
[error]         at scala.collection.parallel.Task.tryLeaf(Tasks.scala:56)
[error]         at scala.collection.parallel.Task.tryLeaf$(Tasks.scala:50)
[error]         at scala.collection.parallel.ParIterableLike$Map.tryLeaf(ParIterableLike.scala:1061)
[error]         at scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.internal(Tasks.scala:170)
[error]         at scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.internal$(Tasks.scala:157)
[error]         at scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.internal(Tasks.scala:440)
[error]         at scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute(Tasks.scala:150)
[error]         at scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute$(Tasks.scala:149)
[error]         at scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.compute(Tasks.scala:440)
[error]         at java.base/java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:189)
[error]         at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
[error]         at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
[error]         at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
[error]         at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
[error]         at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
[error] (coveralls) java.util.NoSuchElementException: key not found: 2/io/kaizensolutions/virgil/codecs/UdtValueEncoderMagnoliaDerivation.scala