chore: Make "params" argument optional in getter methods

[ryami333]

Small (backward-compatible) change to the .getStory (et al) methods to make the second argument (params) optional. So that you can simplify your code in the following way:

import StoryblokClient from "storyblok-js-client";

const storyblokClient = new StoryblokClient({
  // …
});

-storyblokClient.getStory(slug, {}) // Passing redundant empty-object 
+storyblokClient.getStory(slug)
  .then(console.log)
  .catch(console.error);

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Other (please describe):

How to test this PR

• Make a call to client.getAll, client.get, client.getStories or client.getStory.
• Don't pass the params argument.
• Expect no Typescript error.
• Expect no runtime error.

What is the new behavior?

There is no Typescript or runtime error when you defer to the client defaults (omit the params argument) when calling the Storyblok client's getter methods.

[alvarosabu]

Hi @ryami333 thanks a lot for this improvement, I'm good with it being merge, let me check if we need to change documentation before the final ok.

I will merge #550 soon, maybe we will need to pull the changes in this PR.

I keep you posted. Thanks