Support TypeScript integrations

Explicitly add 'types' to each conditional package export.

Close facebook#268

Author: necolas

apps/website/docs/api/04-other/03-document.md

@@ -20,7 +20,7 @@ Only the read-only APIs should be used in the context of React Strict DOM, as Re
 | ---- | ---- | ---- | ---- |
 | document.activeElement | ❌ | ❌ | |
 | document.defaultView | ❌ | ❌ | |
-| document.getElementFromPoint(x,y) | ❌ | ❌ | |
+| [document.elementFromPoint(x,y)](https://developer.mozilla.org/en-US/docs/Web/API/Document/elementFromPoint) | ❌ | ❌ | |
 | document.hidden | ❌ | ❌ | |
 | document.visibilityState | ❌ | ❌ | |
 | "scroll" event | ❌ | ❌ | |

packages/react-strict-dom/package.json

@@ -4,8 +4,14 @@
   "description": "React Strict DOM",
   "exports": {
     ".": {
-      "react-native": "./dist/native/index.js",
-      "default": "./dist/dom/index.js"
+      "react-native": {
+        "types": "./dist/native/index.d.ts",
+        "default": "./dist/native/index.js"
+      },
+      "default": {
+        "types": "./dist/dom/index.d.ts",
+        "default": "./dist/dom/index.js"
+      }
     },
     "./babel-preset": "./babel/preset.js",
     "./runtime": "./dist/dom/runtime.js",