node_modules: update (#314)

Co-authored-by: dawidd6 <9713907+dawidd6@users.noreply.github.com>

node_modules/nodemailer/lib/shared/objects.js

@@ -0,0 +1,42 @@
+'use strict';
+
+// Safe copying of objects whose keys come from the caller.
+//
+// This lives in its own leaf module, like ./url.js, so that every layer can reach it.
+// lib/shared/index.js requires lib/fetch, so lib/fetch can not require lib/shared back,
+// and lib/mime-funcs is a leaf that would otherwise pull in dns/net/os/fs for a string
+// comparison. lib/shared/index.js re-exports both functions for the callers that already
+// depend on it.
+
+/**
+ * Detects a key that can not be copied onto a plain object with `target[key] = value`.
+ *
+ * "__proto__" is the only one: assigning it runs the inherited setter and replaces the
+ * prototype of the target instead of adding a property to it, so a caller can smuggle
+ * values past validation that only inspects own keys. JSON.parse produces such a key
+ * where an object literal can not. "constructor" and "prototype" have no such setter and
+ * become ordinary own properties, so dropping them would only discard legitimate values.
+ *
+ * @param {String} key Key to check
+ * @returns {Boolean} true if the key must not be copied
+ */
+module.exports.isProtoKey = key => key === '__proto__';
+
+/**
+ * Copies own enumerable keys from a source object to a target object. Every copy that
+ * walks the keys of user supplied data goes through here, see isProtoKey.
+ *
+ * @param {Object} target Object to copy the keys to
+ * @param {Object} source Object to copy the keys from
+ * @param {Function} [skip] Optional predicate, return true to leave a key out
+ * @returns {Object} The target object
+ */
+module.exports.copyOwnKeys = (target, source, skip) => {
+    Object.keys(source || {}).forEach(key => {
+        if (module.exports.isProtoKey(key) || (skip && skip(key))) {
+            return;
+        }
+        target[key] = source[key];
+    });
+    return target;
+};