Bump webpack-node-externals from 1.7.2 to 2.5.2

Bumps [webpack-node-externals](https://github.com/liady/webpack-node-externals) from 1.7.2 to 2.5.2.
- [Release notes](https://github.com/liady/webpack-node-externals/releases)
- [Commits](liady/webpack-node-externals@v1.7.2...v2.5.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -68,6 +68,6 @@
         "rimraf": "^3.0.2",
         "webpack": "^4.42.0",
         "webpack-cli": "^3.3.11",
-        "webpack-node-externals": "^1.7.2"
+        "webpack-node-externals": "^2.5.2"
     }
 }