Add multiple rows to the Sheet

[abhilashkasula]

The payload can be now a single object or an array of objects. This allow us to add multiple rows in single request.

Example payloads:

• {Col1: 0}
• [{Col1: 0}]
• [{Col1: 0}, {Col2: 1}]

Also added a simple workflow to generate minified version on every push and upload the minified file in minified branch. Removed the minified file from the master branch.

From now on, we don't need to commit the minified file. The workflow will take care of generating that.

[ziolko]

Thank you @abhilashkasula for this nice contribution! Let me review this in the next few days and then I will merge this.

Cheers, Mateusz

[ziolko]

I am closing the PR due to lack of activity.