Updated composer.json to version 0.5.0
diff --git a/src/php/composer.json b/src/php/composer.json
index dca61a9..3c0cb37 100644
--- a/src/php/composer.json
+++ b/src/php/composer.json
@@ -1,7 +1,7 @@
 {
   "name": "grpc/grpc",
   "description": "gRPC library for PHP",
-  "version": "0.2.0",
+  "version": "0.5.0",
   "homepage": "http://grpc.io",
   "license": "BSD-3-Clause",
   "require": {