typescript 4.2 breaks yarn 2 pnp compat plugin

Bug: https://github.com/yarnpkg/berry/pull/2440

--- a/package.json
+++ b/package.json
@@ -160,7 +160,8 @@
   },
   "resolutions": {
     "chokidar": "^3.4.0",
-    "monaco-editor": "0.20.0"
+    "monaco-editor": "0.20.0",
+    "typescript": "4.1.5"
   },
   "engines": {
     "node": ">=10.13.0",