Bump typescript from 3.9.3 to 4.0.3 in /client

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.3 to 4.0.3.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/compare/v3.9.3...v4.0.3)

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

client/package-lock.json

@@ -22459,9 +22459,9 @@
       }
     },
     "typescript": {
-      "version": "3.9.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.3.tgz",
-      "integrity": "sha512-D/wqnB2xzNFIcoBG9FG8cXRDjiqSTbG2wd8DMZeQyJlP1vfTkIxH4GKveWaEBYySKIg+USu+E+EDIR47SqnaMQ==",
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.3.tgz",
+      "integrity": "sha512-tEu6DGxGgRJPb/mVPIZ48e69xCn2yRmCgYmDugAVwmJ6o+0u1RI18eO7E7WBTLYLaEVVOhwQmcdhQHweux/WPg==",
       "dev": true
     },
     "ultron": {

client/package.json

@@ -66,7 +66,7 @@
     "jest-mock-axios": "^4.2.0",
     "react-scripts": "^3.4.1",
     "source-map-explorer": "^2.4.2",
-    "typescript": "^3.9.3"
+    "typescript": "^4.0.3"
   },
   "repository": {
     "type": "git",