Added Cahngelog file (#27)

* Added Cahngelog file

* Changed SlidingExpiration for the test VerifyExpirationFalse to 100 ms

CHANGELOG.md

@@ -0,0 +1,81 @@
+# 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).
+
+## [Unreleased]
+
+## [1.0.3] - 2018-10-04
+
+### Added
+
+- Changelog file to keep track of changes.
+- More tests to improve code coverage.
+
+### Changed
+
+- Switched for most cases to `TaskCreationOptions.RunContinuationsAsynchronously`.
+- Improved code documentation for the `DataLoader` class.
+
+## [1.0.2] - 2018-09-27
+
+### Added
+
+- More tests to improve code coverage.
+
+### Removed
+
+- Removed `null` check from `Result.Resolve`, because `null` is a valid value.
+
+## [1.0.1] - 2018-08-30
+
+### Added
+
+- Implemented promise state cleanup.
+
+### Changed
+
+- Solved sonar code smell (_Merged if statements_).
+
+### Removed
+
+- Removed dependency `System.Collections.Immutable`.
+
+## [1.0.0] - 2018-08-30
+
+### Added
+
+- More tests to improve code coverage and to solve concurrency issues.
+- Benchmark tests.
+
+### Changed
+
+- Updated build scripts.
+- Updated readme.
+- Moved to _.net core 2.1_ for test projects.
+- Improved _Task_ cache implementation.
+
+### Fixed
+
+- Fixed a few concurrency issues.
+
+## [0.2.0] - 2018-07-30
+
+### Added
+
+- More tests to improve code coverage.
+- Default _LRU_ _Task_ cache implementation.
+- Code documentation.
+
+### Changed
+
+- Updated readme.
+
+[unreleased]: https://github.com/ChilliCream/greendonut/compare/1.0.3...HEAD
+[1.0.3]: https://github.com/ChilliCream/greendonut/compare/1.0.2...1.0.3
+[1.0.2]: https://github.com/ChilliCream/greendonut/compare/1.0.1...1.0.2
+[1.0.1]: https://github.com/ChilliCream/greendonut/compare/1.0.0...1.0.1
+[1.0.0]: https://github.com/ChilliCream/greendonut/compare/0.2.0...1.0.0
+[0.2.0]: https://github.com/ChilliCream/greendonut/compare/0.2.0-preview-1...0.2.0

src/Core.Tests/TaskCacheTests.cs

@@ -398,7 +398,7 @@ public async Task VerifyExpirationFalse()
         {
             // arrange
             var cacheSize = 10;
-            var slidingExpiration = TimeSpan.FromMilliseconds(150);
+            var slidingExpiration = TimeSpan.FromMilliseconds(100);
             var cache = new TaskCache<string, string>(cacheSize,
                 slidingExpiration);
             var key = "Foo";