php: fix composer.json

examples/php/composer.json

@@ -3,6 +3,6 @@
   "description": "gRPC example for PHP",
   "minimum-stability": "dev",
   "require": {
-    "grpc/grpc": "v0.15.0"
+    "grpc/grpc": "v0.15.2"
   }
 }

src/php/composer.json

@@ -8,7 +8,9 @@
   "version": "1.0.0",
   "require": {
     "php": ">=5.5.0",
-    "stanley-cheung/protobuf-php": "v0.6",
+    "stanley-cheung/protobuf-php": "v0.6"
+  },
+  "require-dev": {
     "google/auth": "v0.9"
   },
   "autoload": {