Add support for Scala 2.13

Author: 2m

README.md

@@ -26,6 +26,11 @@ Or a snapshot from a [snapshot repository](https://bintray.com/2m/snapshots/ciri
 resolvers += Resolver.bintrayRepo("2m", "snapshots")
 ```
 
+| version  | scala | ciris      |
+|----------|-------|------------|
+| 0.1      | 2.12  | 0.12.1     |
+| 0.2      | 2.13  | 0.13.0-RC1 |
+
 ## Example usage
 
 This library provides configuration sources as well as decoders from [`ConfigValue`](https://lightbend.github.io/config/latest/api/?com/typesafe/config/ConfigValue.html) values.

build.sbt

@@ -1,10 +1,10 @@
 organization := "lt.dvim.ciris-hocon"
 name := "ciris-hocon"
 
-scalaVersion := "2.12.10"
+scalaVersion := "2.13.1"
 
 libraryDependencies ++= Seq(
-  "is.cir"        %% "ciris-core" % "0.12.1",
+  "is.cir"        %% "ciris-core" % "0.13.0-RC1",
   "com.typesafe"  % "config"      % "1.4.0",
   "org.scalatest" %% "scalatest"  % "3.1.0" % "test"
 )