Document Proxy-Wasm ABI v0.1.0. (#52)

Signed-off-by: Piotr Sikora <code@piotrsikora.dev>

Author: PiotrSikora

CHANGELOG.md

@@ -9,3 +9,36 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Added
 
 - Added `proxy_get_log_level`.
+
+## 0.2.0 - 2020-08-03
+
+### Added
+
+- Added `proxy_close_stream`.
+
+- Added `proxy_on_foreign_function`.
+
+### Changed
+
+- `proxy_on_request_headers` and `proxy_on_response_headers` added `end_of_stream`
+  flag as the 3rd argument.
+
+- `proxy_get_header_map_value` now returns `NOT_FOUND` instead of `OK` with
+  an empty value for non-existing keys.
+
+- Replaced `proxy_continue_request` with `proxy_continue_stream(HTTP_REQUEST)`.
+
+- Replaced `proxy_continue_response` with `proxy_continue_stream(HTTP_RESPONSE)`.
+
+- Replaced `proxy_get_configuration` with `proxy_get_buffer_bytes(VM_CONFIGURATION)`
+  and `proxy_get_buffer_bytes(PLUGIN_CONFIGURATION)`.
+
+### Removed
+
+- Removed `proxy_clear_route_cache`.
+
+## 0.1.0 - 2020-02-29
+
+### Added
+
+- Initial release.