v0.29.3

Fixed

• java/kotlin-android: honor per-language generate.async_wrappers = false when emitting Java CompletableFuture helpers and Kotlin Android suspend wrappers.
• java (scaffold): derive the maven-source-plugin source include from the Maven group's first path segment instead of a hardcoded dev/**, so the sources jar is non-empty after the io.xberg group migration (fixes Sonatype "Sources must be provided").