Add minimum versions for Dart and Kotlin

Author: simolus3

usage/use-case-examples/raw-tables.mdx

@@ -22,6 +22,8 @@ This eliminates overhead associated with extracting values from the JSON data an
 
 Raw tables were introduced in the following versions of our client SDKs:
 - __JavaScript__ (Node: `0.8.0`, React-Native: `1.23.0`, Web: `1.24.0`)
+- __Dart__: Version 1.15.0 of `package:powersync`.
+- __Kotlin__: Version 1.3.0
 
 Also note that raw tables are only supported by the new [Rust-based sync client](https://releases.powersync.com/announcements/improved-sync-performance-in-our-client-sdks), which is currently opt-in.
 </Note>