Bump webpack from 3.5.5 to 5.94.0 in /cdap-ui-upgrade

Bumps [webpack](https://github.com/webpack/webpack) from 3.5.5 to 5.94.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v3.5.5...v5.94.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

cdap-ui-upgrade/package.json

@@ -11,7 +11,7 @@
   "devDependencies": {
     "babel-core": "6.26.0",
     "babel-loader": "6.2.5",
-    "webpack": "3.5.5",
+    "webpack": "5.94.0",
     "babel-preset-es2015": "6.3.13"
   },
   "dependencies": {