Update doctype-to-string dependency.

package-lock.json

@@ -3785,8 +3785,8 @@
       }
     },
     "doctype-to-string": {
-      "version": "git+https://code.treora.com/gerben/doctype-to-string#a4ae38f7867b0235e4dbecc2aaa70ecc115faff4",
-      "from": "git+https://code.treora.com/gerben/doctype-to-string#semver:^0.1.2"
+      "version": "git+https://code.treora.com/gerben/doctype-to-string#4a0ce2acc27084ed312d6fe474d98fd36f56513d",
+      "from": "git+https://code.treora.com/gerben/doctype-to-string#semver:^0.1.3"
     },
     "domexception": {
       "version": "1.0.1",

package.json

@@ -41,6 +41,6 @@
     ]
   },
   "dependencies": {
-    "doctype-to-string": "git+https://code.treora.com/gerben/doctype-to-string#semver:^0.1.2"
+    "doctype-to-string": "git+https://code.treora.com/gerben/doctype-to-string#semver:^0.1.3"
   }
 }