Update CHANGELOG with v0.2.0 additions

Author: Chocapikk

CHANGELOG.md

@@ -8,8 +8,20 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Added
+
+- AsyncClient with full async/await support using httpx
+- Simple `search()` API accepting raw query strings
+- `get_domain()` method for domain lookups
+- `get_api_status()` and `is_pro()` methods for account info
+- Rate limit handling with automatic retry and exponential backoff
+- Streaming `bulk_export_stream()` for memory-efficient exports
+- Async example in `example/example_async_client.py`
+
 ### Changed
 
+- Lowered Python requirement from 3.13 to 3.11
+- Moved inline code examples from README to `example/` directory
 - Updated l9format requirement from =1.3.2 to =1.4.0 ([ae676d9])
 
 ## [0.1.10] - 2024-12-XX