v4.16.0

Changes since v4.15.3:

New features:

• Add a confirmation step before creating a backup.
  Non-interactive scripts must use -y or --yes or --no-interaction.
  For more detail, see: #1414
• Use MariaDB-specific command names in "db:" commands.
• Make push --activate ensure the environment status after pushing, whether or
  not new commits were pushed.

Other changes:

• Use git push options always.
• Configuration changes:
  • Move config service.header_prefix to detection.cluster_header and make
    it optional.
  • Remove the need for a service.slug config key.
• Fix recommending an SSH key when not needed.
• Bump giggsey/libphonenumber-for-php from 8.13.30 to 8.13.31
• Bump composer/ca-bundle from 1.4.0 to 1.4.1

v4.15.3...v4.16.0

SHA-256 checksum for platform.phar:
b9840ed75a77ae107a7872c46a06a3e4940b4ff7705aff880c25d6007165f19b