Update CHANGELOG.md

CHANGELOG.md

@@ -1,38 +1,42 @@
 # Changelog
 
-## [0.2.0] - [Unreleased]
+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).
 
+## [0.2.0] - 2021-05-28
 ### Added
-
-- Sub-hourly unit commitment
-- Added function `UnitCommitment.write(filename, solution)`
-- Added mathematical formulation to the documentation
+- Add sub-hourly unit commitment
+- Add `UnitCommitment.write(filename, solution)`
+- Add mathematical formulation to the documentation
 
 ### Changed
-
-- Renamed "Time (h)" parameter to "Time horizon (h)"
+- Rename "Time (h)" parameter to "Time horizon (h)"
+- Rename `UnitCommitment.get_solution` to `UnitCommitment.solution`, for better
+  consistency with JuMP style.
+- Add an underscore to the name of all functions that do not appear in the
+  documentation (e.g. `something` becomes `_something`) These functions are not
+  part of the public API and may change without notice, even in patch versions.
 - The function `UnitCommitment.build_model` now returns a plain JuMP model. The
-  struct `UnitCommitmentModel` has been completely removed. Accessing model elements can now be accomplished as follows:
+  struct `UnitCommitmentModel` has been completely removed. Accessing model
+  elements can now be accomplished as follows:
     - `model.vars.x[idx]` becomes `model[:x][idx]`
     - `model.eqs.y[idx]` becomes `model[:eq_y][idx]`
     - `model.expr.z[idx]` becomes `model[:expr_z][idx]`
     - `model.obj` becomes `model[:obj]`
     - `model.isf` becomes `model[:isf]`
     - `model.lodf` becomes `model[:lodf]`
-- The function `UnitCommitment.get_solution` has been renamed to `UnitCommitment.solution`
-- All function that do not appear in the documentation have been renamed to `_something`.
-  These functions are not part of the public API and may change without notice.
 
 ### Fixed
-
-- Properly validate solutions with price-sensitive loads.
+- Properly validate solutions with price-sensitive loads
 
 ## [0.1.1] - 2020-11-16
+### Added
+- Add OR-LIB and Tejada19 instances
+- Improve documentation
 
-* Fixes to MATLAB and PGLIB-UC instances
-* Add OR-LIB and Tejada19 instances
-* Improve documentation
+## Fixed
+- Fixes to MATLAB and PGLIB-UC instances
 
 ## [0.1.0] - 2020-11-06
-
-* Initial public release
+- Initial public release