v0.3.0

What's Changed

• [Docs] Update the squad from Squad-Spec-Repository-Template by @LarsLaskowski in #56
• [Webhook] Process deliveries and send notifications through the outbox by @LarsLaskowski in #57
• [Docs] Update the squad from Squad-Spec-Repository-Template by @LarsLaskowski in #58
• [Rules] Add the pull request rules by @LarsLaskowski in #59
• [Docs] Update the squad from Squad-Spec-Repository-Template by @LarsLaskowski in #61
• [Docs] Describe how real deliveries become fixtures by @LarsLaskowski in #62
• [Delivery] Send messages silently during quiet hours by @LarsLaskowski in #63
• [Docs] Prepare release 0.3.0 by @LarsLaskowski in #64

Full Changelog: v0.2.0...v0.3.0