Upgrading facets (8006) and block_content (8.6.x) at the same time cause a fatal error

Problem/Motivation

While trying to upgrade Drupal Core to 8.6 with Block Content enabled at the same time that Facets (update 8006) I'm facing a fatal error.
block_content_update_8600 adds and populates a new db field on blocks so, when facets_update_8006 tries to load a block before block_content_update_8600 has been run, you get to following error:

[notice] Update started: facets_update_8006
 [error]  SQLSTATE[42S22]: Column not found: 1054 Unknown column 'block_content_field_data.reusable' in 'where clause': SELECT base_table.revision_id AS revision_id, base_table.id AS id
FROM
{block_content} base_table
INNER JOIN {block_content_field_data} block_content_field_data ON block_content_field_data.id = base_table.id
WHERE (block_content_field_data.reusable IN (:db_condition_placeholder_0)) AND (block_content_field_data.default_langcode IN (:db_condition_placeholder_1)); Array
(
    [:db_condition_placeholder_0] => 1
    [:db_condition_placeholder_1] => 1
)

Proposed resolution

Implement hook_update_dependencies() to declare the dependency.