Update scala to 2.13.2

.travis.yml

@@ -1,6 +1,6 @@
 language: scala
 scala:
-  - 2.13.1
+  - 2.13.2
 
 jdk:
   - openjdk8

build.sbt

@@ -9,7 +9,7 @@ val elmCompileMode = settingKey[ElmCompileMode]("How to compile elm sources")
 
 val sharedSettings = Seq(
   organization := "com.github.eikek",
-  scalaVersion := "2.13.1",
+  scalaVersion := "2.13.2",
   scalacOptions ++= Seq(
     "-deprecation",
     "-encoding", "UTF-8",

modules/joex/src/main/scala/docspell/joex/process/ConvertPdf.scala

@@ -1,7 +1,6 @@
 package docspell.joex.process
 
 import bitpeace.{Mimetype, MimetypeHint, RangeDef}
-import cats.implicits._
 import cats.Functor
 import cats.implicits._
 import cats.effect._

modules/restserver/src/main/scala/docspell/restserver/webapp/WebjarRoutes.scala

@@ -1,7 +1,6 @@
 package docspell.restserver.webapp
 
 import cats.effect._
-import org.http4s._
 import org.http4s.HttpRoutes
 import org.http4s.server.staticcontent.webjarService
 import org.http4s.server.staticcontent.NoopCacheStrategy