fix: ui/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-CROSSSPAWN-8303230
- https://snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908
- https://snyk.io/vuln/SNYK-JS-BRACES-6838727
- https://snyk.io/vuln/SNYK-JS-NTHCHECK-1586032
- https://snyk.io/vuln/SNYK-JS-SEMVER-3247795
- https://snyk.io/vuln/SNYK-JS-BABELRUNTIME-10044504
- https://snyk.io/vuln/SNYK-JS-TAR-6476909
- https://snyk.io/vuln/SNYK-JS-TAR-1579147
- https://snyk.io/vuln/SNYK-JS-TAR-1579152
- https://snyk.io/vuln/SNYK-JS-TAR-1579155
- https://snyk.io/vuln/SNYK-JS-MICROMATCH-6838728
- https://snyk.io/vuln/SNYK-JS-PATHPARSE-1077067
- https://snyk.io/vuln/SNYK-JS-NODEFORGE-2430339
- https://snyk.io/vuln/SNYK-JS-NODEFORGE-2430337
- https://snyk.io/vuln/SNYK-JS-NODEFORGE-2430341
- https://snyk.io/vuln/SNYK-JS-MINIMATCH-3050818
- https://snyk.io/vuln/SNYK-JS-PRISMJS-9055448
- https://snyk.io/vuln/SNYK-JS-TAR-1536758

Author: snyk-bot

ui/package.json

@@ -37,15 +37,15 @@
     "deepmerge": "^3.2.0",
     "foundation-sites": "^6.4.3",
     "git-url-parse": "^11.1.2",
-    "html-webpack-plugin": "^3.2.0",
+    "html-webpack-plugin": "^4.0.0",
     "jest-junit": "^6.4.0",
     "js-yaml": "^3.13.1",
     "json-merge-patch": "^0.2.3",
     "minimatch": "^3.0.4",
     "moment": "^2.24.0",
     "monaco-editor": "^0.15.6",
     "monaco-editor-webpack-plugin": "^1.7.0",
-    "node-sass": "^6.0.1",
+    "node-sass": "^9.0.0",
     "prop-types": "^15.6.0",
     "raw-loader": "^0.5.1",
     "react": "^16.9.3",
@@ -61,7 +61,7 @@
     "react-router": "^4.3.1",
     "react-router-dom": "^4.2.2",
     "react-svg-piechart": "^2.1.1",
-    "redoc": "^2.0.0-rc.40",
+    "redoc": "^2.0.0",
     "sass-loader": "^6.0.6",
     "source-map-loader": "^0.2.3",
     "style-loader": "^0.20.1",
@@ -75,7 +75,7 @@
     "unidiff": "^1.0.2",
     "webpack": "^4.44.2",
     "webpack-cli": "^3.3.12",
-    "webpack-dev-server": "^3.11.0"
+    "webpack-dev-server": "^4.7.3"
   },
   "resolutions": {
     "@types/react": "16.9.3",