v2.1.0

What's Changed

Breaking Changes

• Removed illuminate/collections dependency — all internal usage replaced with plain PHP array functions. If you relied on this as a transitive dependency, add it to your own composer.json.
• mail() now throws RuntimeException on failure — previously exit codes were silently discarded.
• EncryptionMode::MIME renamed to EncryptionMode::SMIME — the CLI flag is --smime, not --mime. String 'mime' is still accepted as an alias.
• symlink() default path fixed — now correctly resolves $HOME via getenv('HOME') instead of using an unexpandable literal string.

New Features

• Fluent Builder API — new Emate::compose() static factory with chainable setters:

  Emate::compose()
      ->to('recipient@example.com')
      ->sender('sender@example.com')
      ->subject('Hello')
      ->body('Email body')
      ->markdown()
      ->encrypt()
      ->sign()
      ->sendNow()
      ->encryptionMode(EncryptionMode::SMIME)
      ->signature('Best regards')
      ->header('X-Priority', '1')
      ->mail();

• Signature support — set text or reference existing signature by UUID via 'signature' option or ->signature() fluent setter.
• Custom headers — add arbitrary email headers via 'headers' option or ->header('Name', 'Value') fluent setter.
• markdown option now accepts truthy strings — recognizes true, 'yes', and 'true' (same as encrypt, sign, send_now).

Fixes

• S/MIME encryption mode — now generates correct --smime flag instead of invalid --mime.
• Changelog workflow — added concurrency group and git pull --rebase to prevent failures from simultaneous release events.

Internal

• Simplified all command-building methods to return strings directly instead of keyed arrays.
• Replaced Collection-based data flow with array_map/implode/explode.

See UPGRADE.md for migration details.