add phpunit 4.8 to require-dev

Shaun Bramley · jsor · commit 5454a5a6fd8e · 2017-03-17T10:03:40.000+01:00
diff --git a/composer.json b/composer.json
@@ -8,6 +8,10 @@
     "require": {
         "php": ">=5.4.0"
     },
+    "require-dev": {
+        "phpunit/phpunit": "~4.8"
+    },
+    
     "autoload": {
         "psr-4": {
             "React\\Promise\\": "src/"
