Use java-version (#14)

action.yml

@@ -2,7 +2,7 @@ name: 'Setup Java environment'
 description: 'Setup your runner with Java'
 author: 'GitHub'
 inputs: 
-  version:
+  java-version:
     description: 'The JDK version to make available on the path. Takes a whole or semver Jdk version, or 1.x syntax (e.g. 1.8 => Jdk 8.x)'
     required: true
   architecture:
@@ -12,6 +12,9 @@ inputs:
   jdkFile:
     description: 'Path to where the compressed JDK is located. The path could be in your source repository or a local path on the agent.'
     required: false
+# Deprecated option, do not use. Will not be supported after October 1, 2019
+  version:
+    description: 'Deprecated. Use java-version instead. Will not be supported after October 1, 2019'
 runs:
   using: 'node12'
   main: 'lib/setup-java.js'