CodeJam 2.1.1 Release Notes
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What's new in 2.1.1
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* Fix package dependencies
* Fix version

What's new in 2.1.0-rc1
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* FW 4.7.2 support
* Enum constraints in EnumHelper (C# 7.3 feature)

What's new in 2.0.0-rc1
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* Sync Acquire in AsyncLock
* Ranges improvement
* Refactoring and code cleanup

What's new in 2.0.0-beta1
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* NetStandard 2.0 & .NET Core 2.0 support
* Add IntervalTree collection
* Add Disposable.Create overload with state param
* Add Enumerable.TakeLast/SkipLast methods
* Refactoring, fixes and code cleanup