fix: ui/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-DIFF-14917201
- https://snyk.io/vuln/SNYK-JS-TAR-15032660

Author: snyk-bot

ui/package.json

@@ -32,7 +32,7 @@
     "classnames": "^2.2.5",
     "color": "^3.1.0",
     "cookie": "^0.3.1",
-    "copy-webpack-plugin": "^6.1.1",
+    "copy-webpack-plugin": "^7.0.0",
     "dagre": "^0.8.2",
     "deepmerge": "^3.2.0",
     "foundation-sites": "^6.4.3",
@@ -68,11 +68,11 @@
     "superagent": "^3.8.2",
     "superagent-promise": "^1.1.0",
     "ts-loader": "^6.0.4",
-    "ts-node": "^4.1.0",
+    "ts-node": "^8.1.1",
     "tslint": "^6.1.3",
     "tslint-react": "^3.4.0",
     "typescript": "^4.0.3",
-    "unidiff": "^1.0.2",
+    "unidiff": "^1.0.3",
     "webpack": "^4.44.2",
     "webpack-cli": "^3.3.12",
     "webpack-dev-server": "^3.11.0"