Added code suggestions

Author: kiroco12

.travis.yml

@@ -22,7 +22,7 @@ before_install:
   fi
 
 after_success:
-- if [ "$TRAVIS_BRANCH" = "master" -a "$TRAVIS_PULL_REQUEST" = "false" -a "$TRAVIS_SCALA_VERSION" = "2.12.10" ]; then
+- if [ "$TRAVIS_BRANCH" = "master" -a "$TRAVIS_PULL_REQUEST" = "false" -a "$TRAVIS_SCALA_VERSION" = "2.13.1" ]; then
      sbt ++$TRAVIS_SCALA_VERSION publishSignedAll;
      echo "Deploying to Heroku";
      docker login --username=noel.m@47deg.com --password=$heroku_token registry.heroku.com;

project/ProjectPlugin.scala

@@ -115,8 +115,6 @@ object ProjectPlugin extends AutoPlugin {
       scalaVersion := "2.13.1",
       scalaOrganization := "org.scala-lang",
       javacOptions ++= Seq("-encoding", "UTF-8", "-Xlint:-options"),
-      //javaOptions += "-Dscala.classpath.closeZip=true",
-      //fork in Test := false,
       parallelExecution in Test := false,
       cancelable in Global := true,
       headerLicense := Some(

server/src/main/scala/org/scalaexercises/evaluator/evaluation.scala

@@ -257,7 +257,7 @@ private class StringCompiler(
     // ...and 1/2 this line:
     compiler.compileSources(sourceFiles)
 
-    if (reporter.hasErrors /* || reporter.hasWarnings*/ ) {
+    if (reporter.hasErrors  || reporter.hasWarnings ) {
       val msgs: List[List[String]] = reporter match {
         case collector: MessageCollector =>
           collector.messages.toList