update readme for 0.2.4 release

Author: hipjim

README.md

@@ -17,17 +17,19 @@ and give the user different backoff strategies.
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.github.hipjim/scala-retry_2.12/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.github.hipjim/scala-retry_2.12)
 
 ```scala
-libraryDependencies += "com.github.hipjim" % "scala-retry_2.12" % "0.2.3"
+libraryDependencies += "com.github.hipjim" % "scala-retry_2.12" % "0.2.4"
 ```
 
 ```xml
 <dependency>
   <groupId>com.github.hipjim</groupId>
   <artifactId>scala-retry_2.12</artifactId>
-  <version>0.2.3</version>
+  <version>0.2.4</version>
 </dependency>
 ```
 
+Versions for ```Scala 2.11``` and ```Scala 2.12``` are available.
+
 ## Tutorial
 
 ```scala

build.sbt

@@ -4,7 +4,7 @@ organization := "com.github.hipjim"
 
 crossScalaVersions := Seq("2.10.6", "2.11.10", "2.12.7")
 
-version := "0.2.3"
+version := "0.2.4"
 
 scalaVersion := "2.12.7"
 
@@ -23,11 +23,7 @@ scalacOptions ++= Seq(
   // Features enabled by default
   "-language:higherKinds",
   "-language:implicitConversions",
-  "-language:experimental.macros",
-  // possibly deprecated options
-  "-Ywarn-inaccessible",
-  // absolutely necessary for Iterant
-  "-Ypartial-unification"
+  "-language:experimental.macros"  
 )
 
 // Targeting Java 6, but only for Scala <= 2.11