Tests seem broken locally

I tried running tests on a fresh checkout today and tests are failing.

When running with the current package-lock deps, I get:

```
1) [chromium] › service-worker.spec.ts:265:3 › service worker › recover from outdated service worker

Test timeout of 5000ms exceeded.
```

When running after an `npm update`, I get a different error:

```
Error: Internal error: unexpected file imported in the worker: /Users/justin/Projects/Lit/playground-elements/web-dev-server.config.js
at getFromCompilationCache (/Users/justin/Projects/Lit/playground-elements/node_modules/@playwright/test/lib/common/compilationCache.js:73:46)
at transformHook (/Users/justin/Projects/Lit/playground-elements/node_modules/@playwright/test/lib/common/transform.js:134:53)
at load (/Users/justin/Projects/Lit/playground-elements/node_modules/@playwright/test/lib/experimentalLoader.js:51:47)
at nextLoad (node:internal/modules/esm/loader:164:28)
at ESMLoader.load (node:internal/modules/esm/loader:600:26)
at ESMLoader.moduleProvider (node:internal/modules/esm/loader:452:22)
at new ModuleJob (node:internal/modules/esm/module_job:64:26)
at ESMLoader.#createModuleJob (node:internal/modules/esm/loader:475:17)
at ESMLoader.getModuleJob (node:internal/modules/esm/loader:429:34)
✘ 1 [chromium] › service-worker.spec.ts:192:3 › service worker › simple fresh load (0ms)
```

and many similar errors.

macOS 13.2.1 / M1
Node 19.4.0