Release checklist v0.2.1

[rkistner]

This is a checklist to track the release of v0.2.1.

Changes:

• Prefab build for android - Custom prefab build for Android / v0.2.1 #24 (not relevant for most client SDKs)

Core builds:

• Release PR: Custom prefab build for Android / v0.2.1 #24.
• Release: v0.2.1
• Android aar released on Maven Central
• Cocoapod released
• react-native-quick-sqlite - v1.3.0 - powersync-sqlite-core v0.2.1 react-native-quick-sqlite#40
• wa-sqlite build - skipping
• sqlite3.dart build - skipping

SDK updates:

• powersync.dart - v1.8.1 - powersync-sqlite-core v0.2.1 powersync.dart#148
• powersync-js - web - powersync-sqlite-core v0.2.1 powersync-js#289
• powersync-js - react native - powersync-sqlite-core v0.2.1 powersync-js#289
• kotlin
• swift