Use Rotation extension method in PCG32

Move PCG32 into separate RandN.Pcg32 project and package

Move ChaCha into separate RandN.ChaCha project and package

Replaces usages of X86_INTRINSICS with other build variables

Drop .NET Core 3.1 target

Added tag v0.4.0 for changeset a9004333c76f

Bump version to 0.4.0

Update Dependencies

Include README in each package

Added tag v0.4.0-alpha1 for changeset bb407045b639

Add more test cases for XorShift to satisfy Stryker

Add fill tests for smaller arrays

Add extra tests covering XorShift to reduce the number of surviving Stryker mutations

Reorder target frameworks so that the newest versions are first

Complete coverage of distribution stability tests

Add a bunch of tests covering value stability

Switch more missed files to file-scoped namespaces

Use StandardRng in the Example program to set a better... example

Remove unused variables in test

Bump version to 0.4.0-alpha and add preliminary release notes for v0.4.0