System message seeds added.

Faker for all system message types added.

New commands to seed attachments

Image, document and audio seeder commands added.

Updated to work with messenger StoreMessage

StoreMessage param now accepts array. Seeder updated.

Tests added. Bugs fixed.

v0.3-alpha.0

MessengerFakerTest.php passes

Condensed logic to singleton

v0.2-alpha.1

update composer.json to allow main messenger versions ~0.1

First alpha release.

v0.1-alpha.0

update base package