Upgrade Scala and Specs2 versions, closes #8

* Scala
  * 2.10.4 => 2.10.5
  * 2.11.5 => 2.11.6
* Specs2
  * 2.4.15 => 3.0

build.sbt

@@ -4,9 +4,9 @@ version in ThisBuild := "0.1.0"
 
 licenses in ThisBuild += ("BSD New", url("http://opensource.org/licenses/BSD-3-Clause"))
 
-scalaVersion in ThisBuild := "2.11.5"
+scalaVersion in ThisBuild := "2.11.6"
 
-crossScalaVersions in ThisBuild := List("2.10.4", scalaVersion.value)
+crossScalaVersions in ThisBuild := List("2.10.5", scalaVersion.value)
 
 scalacOptions in ThisBuild ++= Seq(
   "-deprecation",

core/build.sbt

@@ -2,11 +2,14 @@ name := "rebind-core"
 
 organization := "com.adelbertc"
 
-resolvers += "bintray/non" at "http://dl.bintray.com/non/maven"
+resolvers ++= Seq(
+  "bintray/non"     at "http://dl.bintray.com/non/maven",
+  "scalaz-bintray"  at "http://dl.bintray.com/scalaz/releases"
+)
 
 val scalazVersion = "7.1.1"
 
-val specs2Version = "2.4.15"
+val specs2Version = "3.0"
 
 libraryDependencies ++= Seq(
   compilerPlugin("org.spire-math" %% "kind-projector" % "0.5.2"),