Update build.sbt

Author: takezoe

Diff for: build.sbt

@@ -5,6 +5,6 @@ scalaVersion := "2.13.5"
 gitbucketVersion := "4.35.3"
 
 scalacOptions := Seq("-deprecation", "-feature", "-language:postfixOps")
-javacOptions in compile ++= Seq("-target", "8", "-source", "8")
+Compile / javacOptions ++= Seq("-target", "8", "-source", "8")
 
 useJCenter := true