Added support for .NET 6, removed use of TypeInfo

Added netcoreapp3.1 target

Fixed bug where same generic service was being decorated multiple times

Swallow assembly loading exceptions when scanning dependencies

Added new RegistrationStrategy.Throw and filter out types with specia…

…l names

Various bugfixes and tweaks

Fixed bug with open generic decoration

New package push to try to fix khellang#60

Fixed messed up signing

Various new features and improvements:

- Changed target frameworks to .NET Framework 4.6.1 and .NET Standard 2.0.
- Add option to scan exact namespace. See khellang#48.
- Update to the latest Microsoft.Extensions.DependencyInjection version. See khellang#50.
- Strong-named assembly. See khellang#53.
- Add support for registering all interfaces against a single implementation. See khellang#57 and khellang#58.
- Add source link support. See khellang#59.