features 8.x-3.8

This release includes fixes needed for compatibility with Drupal 8.6, plus other bug fixes.

Changes since 8.x-3.7:

• #2998374 by nedjo: UnknownExtensionException thrown on Features generation page when bundle has install profile
• #2998333 by nedjo: Test failures with core 8.6
• #2943737 by nedjo: Optional configuration reassigned to config/install
• #2904150 by Vidushi Mehta: Fix code standard format
• #2960423 by JKerschner: Standardize on prefixless border-radius
• #2949343 by dpagini, mfernea: List packages from default bundle using Drush
• #2966671 by vakulrai, imshivani, brahmjeet789: Use Short Array (New Coding Standard)
• #2976737 by g_miric: Drush 9: Features should have an extra.drush.services section in its composer.json
• #2983643 by chipway: Apply new {project}:{module} format for dependencies in info.yml
• #2951792 by zuuperman: Description on export form triggers notices and is displayed as array
• #2992790 by mrhorse: Error: Class 'Drupal\component\Utility\Unicode' not found in Drupal\features\Plugin\FeaturesAssignment\FeaturesAssignmentBaseType->assignPackages