Merge pull request #4137 from rgbkrk/opt-back-in-to-composite

switch jext's tsconfig back to composite: true

applications/jupyter-extension/tsconfig.json

@@ -5,8 +5,7 @@
     // Since webpack can handle esnext, we can make our apps produce esnext
     // so that webpack can do better tree shaking, code splitting, and dynamic imports
     "module": "esnext",
-    "noEmit": true,
-    "composite": false
+    "noEmit": true
   },
   "include": ["nteract_on_jupyter/app", "nteract_on_jupyter/global.d.ts"],
   "references": [