Release Checklist v0.2.0

[rkistner]

This is a checklist to track the release of v0.2.0.

Changes:

• Sync optimizations - Sync Optimizations #19
• Add powersync_client_id() / powersync_last_synced_at() / powersync_clear() - powersync_client_id() / powersync_last_synced_at() / powersync_clear() #21

Core builds:

• Release PR: v0.2.0 #22.
• Release: v0.2.0
• Android aar released on Maven Central
• Cocoapod released
• wa-sqlite build - Released as 0.3.0 - Version Packages wa-sqlite#12 / powersync-sqlite-core v0.2.0 wa-sqlite#11
• sqlite3.dart build - Released v2.4.5-powersync.0.2.0 in powersync-sqlite-core 0.2.0 sqlite3.dart#8

Skipping SDK updates, going to v0.2.1 instead:

• powersync.dart
• powersync-js - web
• react-native-quick-sqlite
• powersync-js - react native
• kotlin
• swift