update ts in another new package.json

Author: mshustov

x-pack/plugins/apm/e2e/package.json

@@ -17,7 +17,7 @@
     "p-limit": "^3.0.1",
     "p-retry": "^4.2.0",
     "ts-loader": "^7.0.5",
-    "typescript": "3.9.6",
+    "typescript": "4.0.2",
     "wait-on": "^5.0.1",
     "webpack": "^4.43.0",
     "yargs": "^15.4.0"