Fix client allowing extraneous properties upon creation

[jpwilliams]

Summary

Incorrect properties would be ignored and produce no type errors when creating a client via new Inngest(). For example, the following would show no errors, even though baseURL should be baseUrl:

new Inngest({
  id: "local-dev",
  name: "Local Dev",
  schemas: new EventSchemas().fromUnion<EventUnion>(),

  // Wrong but not error
  baseURL: "http://localhost:9999",
});

This PR ensures we're looking for the exact object instead.

Currently, we also ensure we allow excess properties if the options passed are a variable instead of an object literal, as this may indicate that the user wants to do more with the object.

Checklist

• Added a docs PR that references this PR N/A Improvement
• Added unit/integration tests
• Added changesets if applicable

[changeset-bot]

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Latest commit: 8f3c48b

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