Coverlet output format should receive a list of formats

[lucasteles]

Description

Shoud be possible to pass multiples output formats to coverlet

See here

Repro steps

When create a CoverletParams the type of OutputFormat accepts only one format

Expected behavior

I shold be able to pass a list of output paramters

Known workarounds

Set manually the OutputFormat of DotnetTestOptions

options
  |> fun p -> {
            p with MSBuildParams = {
                 p.MSBuildParams with
                Properties = p.MSBuildParams.Properties @ [("CoverletOutputFormat","cobertura,json")]
            }}

I did a PR #2562 for this, but I cant figure out why it broke

[github-actions]

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