Add exports to satisfy playwright

The `playwright` repo uses `expect`, I'd like to bump the version they're using from `26.4.2` to `27.1.0`. Here is the issue which motivated this change: jestjs#11640

You can see my proposed changes here:
microsoft/playwright@master...mrienstra:patch-3

I haven't opened a PR for those changes yet, hoping to land this one first.

Playwright `npm check-deps` runs `utils/check_deps.js`, which contains a function `allowExternalImport` / `alllowExternalImport` (very recently added in microsoft/playwright#8501), which has a problem with the `expect` `package.json` `exports`, thus the motivation for this PR.

Author: mrienstra

packages/expect/package.json

@@ -12,7 +12,8 @@
   "exports": {
     ".": "./build/index.js",
     "./package.json": "./package.json",
-    "./build/utils": "./build/utils.js"
+    "./build/types": "./build/types.d.ts",
+    "./build/*": "./build/*.js"
   },
   "dependencies": {
     "@jest/types": "^27.1.0",