Merge pull request #596 from nextcloud/dependabot/npm_and_yarn/webpack-merge-5.1.3

Bump webpack-merge from 5.1.2 to 5.1.3

Author: skjnldsv

apps/viewer/package-lock.json

@@ -101,6 +101,6 @@
     "vue-template-compiler": "^2.6.12",
     "webpack": "^4.44.1",
     "webpack-cli": "^3.3.12",
-    "webpack-merge": "^5.1.2"
+    "webpack-merge": "^5.1.3"
   }
 }