working rss feed to nostr publish

node_modules/es5-ext/function/is-function.js

@@ -0,0 +1,8 @@
+"use strict";
+
+var objToString = Object.prototype.toString
+  , isFunctionStringTag = RegExp.prototype.test.bind(/^[object [A-Za-z0-9]*Function]$/);
+
+module.exports = function (value) {
+	return typeof value === "function" && isFunctionStringTag(objToString.call(value));
+};