Bug fixes

Fixed bug. Released a stable and tested version.

Bug fixes:
Dependency namespacing in .info.yml file: #2991795

New features:
Which version of the jquery library is used 2.x or 3.x? If 2.x can it be upgraded to use 3.x?: #2991454
Updated module functionality for compatibility with MixItUp v3 plugin.
Updated README.txt.
Added composer.json.
Updated error messages if the library does not exist.

Fix for composer dependencies.

Various minor bugfixes for the following issues, no new features:

Fixed UI

Notable changes since 7.x-1.0: