update CHANGELOG.md

Signed-off-by: Thibaut Le Page <[email protected]>

CHANGELOG.md

@@ -5,11 +5,31 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-<!--
 ## [Unreleased][]
--->
 
-## [1.0.2] - 2019-02-21
+### Added
+
+  - `transformer.python.Placeholder`: An Expression that wraps a non-Expression
+  (e.g. a Request instance), similarly to how Standalone is a Statement that
+  wraps an Expression. A Placeholder has a `target` (the wrapped object), a
+  `converter` (function capable of transforming the target into an Expression),
+  and a `name` for inspection purposes.
+
+### Fixed
+
+  - A bug in the conversion between Task and Task2 makes Transformer ignore all
+  changes made by plugins to `Task2.request` in the generated locustfile.
+  Thank you [@xinke2411][] for reporting this! (#33)
+
+[@xinke2411]: https://github.com/xinke2411
+
+### Removed
+
+  - `transformer.task.Task.as_locust_action`: As part of the merge between Task
+  and Task2 (#11). `as_locust_action` generates locustfile code as a string,
+  which is made obsolete by the `transformer.python` syntax tree framework. (#33)
+
+## [1.0.2][] - 2019-02-21
 
 ### Added
 
@@ -38,14 +58,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - `transformer.transform.transform` (#14)
   - `transformer.locust.locustfile` (#14)
 
-## [1.0.1] - 2019-02-12
+## [1.0.1][] - 2019-02-12
 
 ### Fixed
 
   - Fix `transformer` command-line crash due to a missing version identifier. (#17)
   - Publish development releases to PyPI for every merge to the `master` branch. (#17)
 
-## [1.0.0] - 2019-02-11
+## [1.0.0][] - 2019-02-11
 
 ### Added