Fix @inngest/test broken; package dist/ (#786)

## Summary
<!-- Succinctly describe your change, providing context, what you've
changed, and why. -->

Fixes `@inngest/test` publishing; `dist/` was not bundled.

## Checklist
<!-- Tick these items off as you progress. -->
<!-- If an item isn't applicable, ideally please strikeout the item by
wrapping it in "~~"" and suffix it with "N/A My reason for skipping
this." -->
<!-- e.g. "- [ ] ~~Added tests~~ N/A Only touches docs" -->

- [ ] ~Added a [docs PR](https://github.com/inngest/website) that
references this PR~ N/A Packaging fix
- [ ] ~Added unit/integration tests~ N/A Packaging fix
- [ ] ~Added changesets if applicable~ N/A Packaging fix

## Related
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<!-- Linear issues are autolinked. -->
<!-- e.g. - INN-123 -->
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<!-- e.g. "- inngest/inngest#123" -->
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links.-->
- Fixes #783

.changeset/purple-insects-do.md

@@ -0,0 +1,5 @@
+---
+"@inngest/test": patch
+---
+
+Fix `@inngest/test` not shipping `dist/` files

packages/test/package.json

@@ -24,6 +24,9 @@
       "types": "./dist/index.d.ts"
     }
   },
+  "files": [
+    "dist"
+  ],
   "keywords": [
     "inngest",
     "test",