Update xmldom

See #1307

Author: teobugslayer

package.json

@@ -76,7 +76,7 @@
     "winreg": "0.0.12",
     "ws": "0.7.1",
     "xcode": "https://github.com/NativeScript/node-xcode/archive/1.4.0.tar.gz",
-    "xmldom": "0.1.19",
+    "xmldom": "0.1.21",
     "xmlhttprequest": "https://github.com/telerik/node-XMLHttpRequest/tarball/master",
     "xmlmerge-js": "0.2.4",
     "yargs": "3.15.0"