v0.0.1

First release: base models, database structure

What's Changed

• Webhooks & Subscriber model by @Spone in #2
• Subscriber <> User relationship by @Spone in #7
• List model by @Spone in #17
• Message model by @Spone in #18
• Dispatch model by @Spone in #19
• Support for delivery webhook by @Spone in #16
• Add Subscription model by @Spone in #20
• Update webhooks to support suppression on multiple models by @Spone in #22
• Support for Open tracking webhook by @Spone in #24
• Add Sender model by @Spone in #26
• Missive::User concern by @Spone in #28