Updating composer dependencies and suggestions.

Signed-off-by: Jason Lewis <jason.lewis1991@gmail.com>

Author: jasonlewis

composer.json

@@ -1,19 +1,23 @@
 {
     "name": "dingo/oauth2-server",
     "description": "PHP OAuth 2.0 implementation.",
-    "license": "BSD 3-Clause",
+    "license": "BSD-3-Clause",
     "authors": [
         {
             "name": "Jason Lewis",
             "email": "jason.lewis1991@gmail.com"
         }
     ],
     "require": {
-        "symfony/http-foundation": "2.4.*",
-        "predis/predis": "0.8.*"
+        "symfony/http-foundation": "2.4.*"
     },
     "require-dev": {
-        "mockery/mockery": "0.9.*"
+        "phpunit/phpunit": "4.0.*",
+        "mockery/mockery": "0.9.*",
+        "predis/predis": "0.8.*"
+    },
+    "suggest": {
+        "predis/predis": "Predis is required to use the Redis storage adapter."
     },
     "autoload": {
         "psr-0": {