Upgrade play version and documentations.

Author: Arty26

README.md

@@ -10,7 +10,7 @@ Read more @ http://bit.ly/2A1AzEq
 
 ## Used Summary
 
-* [Play Framework: 2.7.2](https://www.playframework.com/documentation/2.7.x/Home)
+* [Play Framework: 2.8.0](https://www.playframework.com/documentation/2.8.x/Home)
 * [React: 16.8.6](https://reactjs.org/)
 * [Create React App: 2.1.8](https://github.com/facebookincubator/create-react-app)
 
@@ -39,7 +39,7 @@ Read more @ http://bit.ly/2A1AzEq
     sbt test            # Run both backend and frontend unit tests
 ```
 
-* This seed is not using [scala play views](https://www.playframework.com/documentation/2.6.x/ScalaTemplates). All the views and frontend associated routes are served via [React](https://reactjs.org/) code base under `ui` directory.
+* This seed is not using [scala play views](https://www.playframework.com/documentation/2.8.x/ScalaTemplates). All the views and frontend associated routes are served via [React](https://reactjs.org/) code base under `ui` directory.
 
 ## Complete Directory Layout
 

project/FrontendRunHook.scala

@@ -5,7 +5,7 @@ import scala.sys.process.Process
 
 /**
   * Frontend build play run hook.
-  * https://www.playframework.com/documentation/2.6.x/SBTCookbook
+  * https://www.playframework.com/documentation/2.8.x/SBTCookbook
   */
 object FrontendRunHook {
   def apply(base: File): PlayRunHook = {

project/build.properties

@@ -1 +1 @@
-sbt.version=1.2.8
+sbt.version=1.3.5

project/plugins.sbt

@@ -1,5 +1,5 @@
 // The Play plugin
-addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.7.2")
+addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.8.0")
 
 // Play enhancer - this automatically generates getters/setters for public fields
 // and rewrites accessors of these fields to use the getters/setters. Remove this

ui-build.sbt

@@ -11,7 +11,7 @@ val Success = 0
 val Error = 1
 
 // Run serve task when Play runs in dev mode, that is, when using 'sbt run'
-// https://www.playframework.com/documentation/2.7.x/SBTCookbook
+// https://www.playframework.com/documentation/2.8.x/SBTCookbook
 PlayKeys.playRunHooks += baseDirectory.map(FrontendRunHook.apply).value
 
 // True if build running operating system is windows.