Updating drupal/search_api_db (1.18.0 => 1.19.0)

Updating drupal/smtp (1.0.0-rc4 => 1.0.0)

- book module patch update

- adding custom patch to multiple_fields_remove_button module to add ability to remove date range fields

Updating drupal/config_ignore (2.2.0 => 2.3.0)

Updating drupal/search_api_db (1.17.0 => 1.18.0)

Updating drupal/dropzonejs_eb_widget (2.1.0 => 2.1.0)

- update drush to 9.7.2
- update cweagans/composer-patches ^1.7
- oomphinc/composer-installers-extender ^2.0
- update composer/installers ^1.9