Update Composer, update everything

vendor/drupal/console-en/translations/theme.install.yml

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+description: 'Install theme or themes in the application'
+questions:
+  theme: 'theme name (press <return> to stop adding themes)'
+  invalid-theme: 'Invalid theme "%s"'
+options:
+  theme: 'theme or themes to be installed should be separated by a space'
+  overwrite-config: 'Overwrite active configuration if necessary'
+  set-default: 'Set theme as default theme'
+messages:
+  no-themes: 'You must provide theme or themes to install.'
+  themes-missing: 'Unable to install themes "%s" due they aren''t available'
+  theme-missing: 'Unable to install theme "%s" due is not available'
+  missing-dependencies: 'Unable to install themes "%s" due to missing dependencies "%s"'
+  themes-nothing: 'Nothing to do. All themes "%s" are already installed'
+  theme-nothing: 'Nothing to do. Theme "%s" is already installed'
+  dependencies: 'There are some unmet dependencies: "%s"?'
+  theme-success: 'The "%s" theme has been installed successfully'
+  themes-success: 'The themes "%s" were installed successfully'
+  theme-default-success: 'The "%s" theme has been installed successfully as default theme'
+  disabled-themes: 'Only uninstalled themes will be listed in autocomplete'
+  invalid-theme-default: 'Option default is only valid for one theme'
+examples:
+  - description: 'Install theme specifying the name'
+    execution: |
+      drupal theme:install  mytheme