[meta] add missing engines.node

Author: ljharb

package.json

@@ -35,5 +35,8 @@
 		"safe-publish-latest": "^2.0.0",
 		"tape": "^5.9.0"
 	},
-	"license": "MIT"
+	"license": "MIT",
+	"engines": {
+		"node": ">= 0.4"
+	}
 }