HIPP-1328 - upgrade to scala 3

build.sbt

@@ -1,7 +1,7 @@
 import uk.gov.hmrc.DefaultBuildSettings
 
 ThisBuild / majorVersion := 0
-ThisBuild / scalaVersion := "2.13.12"
+ThisBuild / scalaVersion := "3.3.3"
 
 lazy val microservice = Project("simple-api-deployment-stubs", file("."))
   .enablePlugins(play.sbt.PlayScala, SbtDistributablesPlugin)
@@ -13,6 +13,7 @@ lazy val microservice = Project("simple-api-deployment-stubs", file("."))
   )
   .settings(resolvers += Resolver.jcenterRepo)
   .settings(CodeCoverageSettings.settings: _*)
+  .settings(scalacOptions := scalacOptions.value.diff(Seq("-Wunused:all")))
 
 lazy val it = project
   .enablePlugins(PlayScala)

conf/application.conf

@@ -20,7 +20,7 @@ include "backend.conf"
 appName = simple-api-deployment-stubs
 
 # Default http client
-play.modules.enabled += "uk.gov.hmrc.play.bootstrap.HttpClientModule"
+play.modules.enabled += "uk.gov.hmrc.play.bootstrap.HttpClientV2Module"
 
 # Json error handler
 play.http.errorHandler = "uk.gov.hmrc.play.bootstrap.backend.http.JsonErrorHandler"

project/AppDependencies.scala

@@ -5,11 +5,11 @@ import sbt._
 
 object AppDependencies {
 
-  private val bootstrapVersion = "8.4.0"
+  private val bootstrapVersion = "9.3.0"
 
   val compile = Seq(
     "uk.gov.hmrc"             %% "bootstrap-backend-play-30"  % bootstrapVersion,
-    "io.swagger.parser.v3"     % "swagger-parser"             % "2.1.14"
+    "io.swagger.parser.v3"     % "swagger-parser"             % "2.1.14" // increasing version beyond this causes jackson-databind version conflicts
   )
 
   val test = Seq(

project/plugins.sbt

@@ -4,5 +4,5 @@ resolvers += Resolver.typesafeRepo("releases")
 
 addSbtPlugin("uk.gov.hmrc"        % "sbt-auto-build"     % "3.22.0")
 addSbtPlugin("uk.gov.hmrc"        % "sbt-distributables" % "2.5.0")
-addSbtPlugin("org.playframework"  % "sbt-plugin"         % "3.0.1")
-addSbtPlugin("org.scoverage"      % "sbt-scoverage"      % "2.0.9")
+addSbtPlugin("org.playframework"  % "sbt-plugin"         % "3.0.5")
+addSbtPlugin("org.scoverage"      % "sbt-scoverage"      % "2.1.0")