composer: change branch-alias for master to 0.3-dev

Author: JanTvrdik

composer.json

@@ -24,7 +24,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "0.2-dev"
+			"dev-master": "0.3-dev"
 		}
 	}
 }