Use new array syntax in docs

[bocharsky-bw]

I see this library supports legacy array syntax, but there's no need to use it in docs - it will allow to copy/paste examples easier into your code as well

[alexander-schranz]

I cherry picked your pull request into https://github.com/handcraftedinthealps/goodby-csv.
The fork is registered as handcraftedinthealps/goodby-csv in packagist and released as 1.4.0 Version. Feel free to use the fork.

[bocharsky-bw]

Thanks! Looks like this package isn't maintained since 26 Oct 2018 :/

[alexander-schranz]

Yes thats why we decided to fork it, I already did not have any luck in 2018 to get in contact with a maintainer of the package.