Fix V2 search error with query key in options

[itsjustbrian]

Issue: #430

• Simplifies the logic of getting the query and options from the overload params, making it explicit when query is overridden and when it's not.

• Removes Partial from the type of options when it's the first parameter. This results in a type error when you provide a lone options object without a query key. For example: client.v2.search({ max_results: 1 }) is a type error now. However, the type error is long and hard to read. I'll restate my suggestion from the issue of just reverting to the original API which was clearer, though that would be a breaking change now.

• Adds an additional test scenario for calling search with only an options object. This regrettably adds an additional 1.5 seconds to the runtime.

[PLhery]

Thank you, makes sense, better and cleaner

[PLhery]

Hmm a test broke, but it's not linked to your change, seems to be Twitter related; I'll investigate before creating a new version

[PLhery]

Published in 1.14.0, thank you!