Modernize project

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• Target .NET Standard 2.0, as recommended by Microsoft

  Targeting .NET Standard prior to 2.0 is no longer recommended. See https://aka.ms/dotnet/dotnet-standard-guidance for more details.

• Depend on Hangfire.Core 1.7.0 instead of Hangfire.Core 1.6.0

• Upgrade Newtonsoft.Json to version 13.0.3 in order to fix vulnerability

  NU1903 : Warning As Error: Package 'Newtonsoft.Json' 11.0.1 has a known high severity vulnerability, https://github.com/advisories/GHSA-5crp-9r3c-p9vr

• Fix HTML rendering (properly escape %, < and >)

• Don't use obsolete methods anymore

• Update all test dependencies

• Fix all xUnit and Moq warnings

• Remove AssemblyInfo.cs files

[bhavishyachandra]

@pieceofsummer can you please merge this? Snyk.io is flagging our project as vulnerable due to these dependencies. Thanks for great package, we find it very useful

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Hey Alex, Just a quick reminder to take a look at that pull request when you get a chance. No rush, I just wanted to make sure it didn’t slip through the cracks. Let me know if you have any questions or need anything from me.

Thanks!

[gilmar-sales]

Someone to merge this? @pieceofsummer @odinserj