Upgrade to TypeScript 5.5

[jpwilliams]

Summary

Upgrading to TypeScript 5.5.

We already have tests for this that were running against typescript@rc, so changing them to now target typescript@~5.5.0.

Checklist

• [ ] ~Added a docs PR that references this PR~ N/A Not needed
• [x] Added unit/integration tests
• [x] Added changesets if applicable

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 24a858a4b2626fde56d41abc839912bf44d80d5d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

| Name | Type | | ------------------------------ | ----- | | @inngest/eslint-plugin | Patch | | inngest | Patch | | @inngest/middleware-encryption | Patch |

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