Bump dependency versions

Author: luzrain

composer.json

@@ -23,7 +23,7 @@
         "ext-posix": "*",
         "amphp/amp": "^3.0.2",
         "revolt/event-loop": "^1.0.6",
-        "phpstreamserver/core": "^0.3",
+        "phpstreamserver/core": "^0.4",
         "amphp/http-server": "^3.3.1",
         "amphp/socket": "^2.3.1",
         "psr/http-message": "^2.0",