Merge pull request #83 from ByteInternet/update_composer_dependencies

Author: tdgroot

composer.json

@@ -9,6 +9,7 @@
     ],
     "require": {
         "ext-json": "*",
+        "ext-pcntl": "*",
         "ext-zlib": "*",
         "composer-runtime-api": "^2",
         "deployer/deployer": "dev-master#e374a8e as v7.0.0",