Update documentation

Documentation/changelog/CHANGELOG.md

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+# Changelog
+
+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).
+
+## [1.2.2] - 2021-08-03
+### Removed
+- Removed `WeightedSelectMethodTests.CompareAllMethod`.
+
+### Changed
+- `AliasWeightedSelectMethod` is now an internal sealed class.
+- In `WeightedSelectMethodTests`, `XXX_ReturnValidValue_0` and `XXX_ReturnValidValue_1` now test with `IsNotNull` instead of `AreSame`.
+- The weights of items generated by the `ItemEnumerableGenerator` now include 0.
+
+### Fixed
+- Fixed `IndexOutOfRangeException` being thrown when all weights passed to `AliasWeightedSelectMethod` are the same.
+
+## [1.2.1] - 2021-07-31
+### Added
+- Added `WeightedSelectMethodSpeedTests`.
+
+### Changed
+- Optimized the setup of `AliasWeightedSelectMethod`.
+
+## [1.2.0] - 2021-07-30
+### Added
+- Added alias method and tests.
+    - This is a very effective algorithm for selecting multiple items.
+
+## [1.1.0] - 2021-05-17
+### Added
+- Added `IWeightedSelectMethod.Calculate` method.
+    - This allows the results of the pre-calculation to be cached, resulting in improved performance.
+- Added `CompareAllMethods` test.
+    - All implemented `IWeightedSelectMethod`s must return the same result.
+
+## [1.0.0] - 2021-02-01
+### Added
+- Added the `IWeightedSelector<T>` and `WeightedSelector<T>`.
+- Added an unit tests.
+
+### Changes
+- Renamed the `ToReadOnlyWeightedSelector` method to `ToWeightedSelector`.
+- Renamed the `SelectItem` method that used `UnityEngine.Random.value` to `SelectItemWithUnityRandom`.
+- All WeightedSelectMethods now support weights less than or equal to 0.
+- IWeightedSelectMethod now takes a TemporaryArray<float> as an argument instead of a float[].
+
+### Fixes
+- Fixed a fatal bug that prevented BinaryWeightedSelectMethod from working.
+
+## [0.1.0] - 2021-01-19
+First release

Documentation/changelog/toc.yml

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+- name: Changelog
+  href: CHANGELOG.md

Documentation/docfx.json

@@ -38,6 +38,14 @@
                     "*.yml"
                 ],
                 "dest": "api"
+            },
+            {
+                "src": "changelog",
+                "files": [
+                    "toc.yml",
+                    "*.md"
+                ],
+                "dest": "changelog"
             }
         ],
         "overwrite": [

Documentation/toc.yml

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 - name: Scripting API
-  href: api/
+  href: api/
+- name: Changelog
+  href: changelog/