Accept search params as the first arg for `getJson`/`getHtml`

Search parameters can be now be sent in as the first argument of getJson and getHtml instead of the engine argument. Note that you won't get auto-completions for the supported search parameters for that engine.

// Show result as JSON (async/await with search params as first argument)
const response2 = await getJson({ engine: "google", ...params });
console.log(response2["organic_results"]);

This is useful to align to SerpApi's other libraries.
Provides a warning-free approach if a particular engine type hasn't been added to the library.

serpapi / serpapi-javascript

Accept search params as the first arg for `getJson`/`getHtml` #7