Bug fixes

Bug fixes.
Drupal 8.8+ compatibility.

Issues:

• Issue #3114626 by Stefdewa, recrit: Missing CSS from default paragraphs (experimental) widget
• Issue #3128259 by tresti88: call rebuild on the form_state with every preview click
• Issue #3131741 by ashishdalvi, oknate: Make paragraphs_previewer compatible with Drupal 9.x
• Issue #3053341 by Radelson: Cannot call methods on dialog prior to initialization

Development branch for version 4.0.

Added compatibility with Drupal 9.

Improve converting indexed arrays

This release mainly fixes error reporting around adding the PHPMailer dependencies.

Other bugs & features added since RC1:

The fourth release stable version module. Add fully compatible with Drupal 9.

Changes since 8.x-1.2:

• Issue #3121954 - Minify JS not working in windows environment