fix(deps): update dependency xmldoc to v1.2.0

Author: renovate[bot]

package-lock.json

@@ -12,7 +12,7 @@
     "atom-linter": "10.0.0",
     "atom-package-deps": "5.1.0",
     "sax": "1.2.4",
-    "xmldoc": "1.1.2",
+    "xmldoc": "1.2.0",
     "xregexp": "4.2.4"
   },
   "devDependencies": {