Update README.md

Link to page on nuget.org

Author: Aha43

README.md

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 A  dotnet / c# framework for integration testing where the work of one test can be the build up for the next test.
 
+* [NuGet Package](https://www.nuget.org/packages/Hit/)
+
 ### Example of testing CRUD operations using HIT
 
 HIT tests are defined by `UseAs` attributes that decorate the classes that implements the tests logic. Here is a test implementation that test creating an item given a repository of items: