Js and css files not included for sorting the tables

Thank you Madhan on your patch for making this module work in Drupal 8.

I have refactored how the libraries are retrieved, I have added instructions on how to use composer to automate the libraries download.
I have altered the libraries.yml and some of the JS.

Seems like the patch from #9 also addresses #3015579: Configuration form doesn't save

The above patch was created with git --binary so we can create the .gif files using the patch. This functionality doesn't work on older versions of git, attached is the non binary patch where there is no gif files.

This will override any settings added by another module when that modules page_attachment hook is run before the hook in this patch.

$settings = ['tablesorter' => ['zebra' => $zebra, 'odd' => $odd_class, 'even' => $even_class]];
$page['#attached']['drupalSettings'] = $settings;

I believe needs to be

$settings = ['zebra' => $zebra, 'odd' => $odd_class, 'even' => $even_class];
$page['#attached']['drupalSettings']['tablesorter'] = $settings;

@Damn-Deal-Done that is not how you ask for help if you are struggling to get a module working or applying the patch which has been provided by the "programmers" on this ticket.
Most module maintainers or people who supply patches are doing this voluntarily or part of a working project where you benefit at no cost to yourself. Please be respectful to those contributors and be constructive with your criticism.

@Damn-Deal-Done - working in the issue queue can at times be frustrating, but as a community we strive to be welcoming to everyone. Using language like you did in comments #18 and #23 is unacceptable.
Drupal thrives on community collaboration.
I am unpublishing comments #18 and #23 as they are extremely unproductive.