add scalacOptions

Author: xuwei-k

build.sbt

@@ -3,3 +3,7 @@ organization := "io.github.gitbucket"
 version := "1.0.0"
 scalaVersion := "2.13.12"
 gitbucketVersion := "4.40.0"
+scalacOptions ++= Seq(
+  "-deprecation",
+  "-Xsource:3",
+)

src/main/scala/Plugin.scala

@@ -1,3 +1,4 @@
+import gitbucket.core.controller.ControllerBase
 import io.github.gitbucket.helloworld.controller.HelloWorldController
 import io.github.gitbucket.solidbase.model.Version
 
@@ -7,7 +8,7 @@ class Plugin extends gitbucket.core.plugin.Plugin {
   override val description: String = "First example of GitBucket plug-in"
   override val versions: List[Version] = List(new Version("1.0.0"))
 
-  override val controllers = Seq(
+  override val controllers: Seq[(String, ControllerBase)] = Seq(
     "/*" -> new HelloWorldController()
   )
 }