New features

Issue #2921876 by xdevx, dev.patrick: Convert few arrays to new coding standard
Fixed PHP Code Sniffer issues.
Added Test Case.

Changes in Alpha2:

- Supported theme definition
- Implemented separated cache table
- Implemented performance boost
- Provided Drush commands to export existing display configuration

• Issue #2922107: Updated [Custom Permissions] module from 8.1.0 to 8.1.1, as Custom Permissions module had a - Moderately critical - Access bypass - SA-CONTRIB-2017-083.
• Issue #2922107: Updated the patch for [Custom Permissions] module on the issue of When [content_translation, config_translate] module are enabled, And enabled [Custom Permissions], Then we will get Route "custom_perms_select_list_form" does not exist, Varbase websites are safe, as we had this managed long time ago at this issue link.
• Issue #2921785: Updated [DRD Agent] module from 8.3.4 to 8.3.5
• Issue #2922156: Varbase 8.4.12: Updated [CHANGELOG.md, UPDATE.md] files and filtered the code for Drupal 8 Coding Standard.

Since this is the first release since 2012, we decided to create beta release first.
Please test this version on your site and report issues if things are broken.

A lot of bugs and features have been added since. To highlight a few:

This release adds few new features, as well as fixes one caching bug.

#2922070: Added 'Link to this content' and URL shortener support
#2922084: Fixed missing cache flush.
#2922076: Implemented image style support.
#2922142: Slightly revamped UI.