Bump event machine version

Author: codeliner

composer.json

@@ -18,8 +18,8 @@
   "require": {
     "php": "^7.1",
     "roave/security-advisories": "dev-master",
-    "proophsoftware/event-machine": "^v0.14",
-    "proophsoftware/postgres-document-store": "^0.1",
+    "proophsoftware/event-machine": "^v0.18",
+    "proophsoftware/postgres-document-store": "^0.3",
     "prooph/pdo-event-store": "^1.0",
     "prooph/humus-amqp-producer": "^2.0",
     "zendframework/zend-stdlib": "^3.1.0",