Merge pull request scala#9879 from scala-steward/update/2.12.x/sbt-1.5.8

Update sbt to 1.5.8 in 2.12.x

Author: SethTisue

project/build.properties

@@ -1 +1 @@
-sbt.version=1.5.7
+sbt.version=1.5.8

scripts/common

@@ -15,7 +15,7 @@ rm -rf "$WORKSPACE/resolutionScratch_"
 mkdir -p "$WORKSPACE/resolutionScratch_"
 
 SBT_CMD=${SBT_CMD-sbt}
-SBT_CMD="$SBT_CMD -sbt-version 1.5.7"
+SBT_CMD="$SBT_CMD -sbt-version 1.5.8"
 
 # repo to publish builds
 integrationRepoUrl=${integrationRepoUrl-"https://scala-ci.typesafe.com/artifactory/scala-integration/"}