Require EE v0.1 versions

Author: codeliner

composer.json

@@ -18,9 +18,9 @@
   "require": {
     "php": "^7.2",
     "roave/security-advisories": "dev-master",
-    "event-engine/php-schema": "dev-master",
-    "event-engine/php-data": "dev-master",
-    "event-engine/php-engine-utils": "dev-master",
+    "event-engine/php-schema": "^0.1",
+    "event-engine/php-data": "^0.1",
+    "event-engine/php-engine-utils": "^0.1",
     "ramsey/uuid" : "^3.6"
   },
   "require-dev": {