Bump webpack from 2.7.0 to 5.94.0

Bumps [webpack](https://github.com/webpack/webpack) from 2.7.0 to 5.94.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v2.7.0...v5.94.0)

---
updated-dependencies:
- dependency-name: webpack
  dependency-type: direct:development
...

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

package.json

@@ -24,7 +24,7 @@
  "style-loader": "^0.18.0",
  "uglify-js": "^3.0.10",
  "uglifyjs-webpack-plugin": "^0.4.3",
- "webpack": "^2.6.0"
+ "webpack": "^5.94.0"
  },
  "name": "wagtail-personalisation",
  "description": "Wagxperience personalisation module for Wagtail.",