NUnit3Settings: Params and multiple results

[Roemer]

There are some important things missing from the NUnit3Settings class:

Params

It is possible to pass parameters to the tests (which can be read with TestContext.Parameters[].
An example would be:
--params=uia=2
So it's one or more key-value pairs.
It would be great to have that in the NUnit3Settings as well.

Multiple results

In some cases, I need to be able to have multiple result formats.
For example when using Jenkins: Jenkins only understands the v2 format but the v3 format has more information. So I need to have the v2 for Jenkins and v3 in the artefacts.
NUnit-Console allows to receive multiple --result so the current property should be extended to be a list of a new class like NUnit3Result which has a Format, Transform and Name property which would replace the current result properties from NUnit3Settings

[Roemer]

I might make the changes myself and create a PR.
This would lead to breaking changes as some properties would be changed. Is this in general ok or should we create new properties and mark the old ones obsolete?