* updates project structure

* automated code formatting and non api destructive code improvements

The is a known broken test case for Arcus.Tests.IPAddressCompatibilityTests.IPAddressTryParseSuccessTest for the input `abcd::%`

* documentation tweaks

* spelling

* updates docs

* modifies github templated

* addresses simple warnings

* removes limited use of Moq and replaces with NSubstitute

* cleaning test warnings; trying to get .NET 4.8 tests to compelte

* fixes testing issues

* Cleaned up comparison logic for IPAddressRange and Subnet

* updates packages

* Now using xUnit.v3 and added IXunitSerializer to help debug failing tests

* fixes copy/paste error Subnet.Equals(object obj) addressing failed test

* clarified .NET targeting IP Address parse expectations

* renames test file to match convention

* package updates

* updates readme with modern info

* Addressing known bug in Subnet.TryIPv4FromPartial(string, out Subnet)

#59 -  Subnet.TryIPv4FromPartial(string , out Subnet) throws FormatException if the string input contains a malformed 0-prefixed octet that is not a valid octal number.

* updated ReadTheDocs based on breaking changes

* removes Roslynator.Testing.CSharp.Xunit

I made a bad assumption, `Roslynator.Testing.CSharp.Xunit` is not relevant

* Update README.md

Co-authored-by: Drew Antonich <drewanton@gmail.com>

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Co-authored-by: Drew Antonich <drewanton@gmail.com>