added switch between warnings and errors output type

[lsvhome]

switching between warnings and errors with TreatWarningsAsErrors property variable of *.csproj

[JoshuaKGoldberg]

@lsvhome I don't follow why you're proposing this change. Could you please explain the reason?

[lsvhome]

When I use tslint for specific configurations I want to separate two workflows: 1) Debug mode when tslint warnings allowed 2) Release mode when tslint warnings should be fixed

In my case csproj contains standatd property TreatWarningsAsErrors

<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <TreatWarningsAsErrors>false</TreatWarningsAsErrors> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <TreatWarningsAsErrors>true</TreatWarningsAsErrors> </PropertyGroup>

And I use TreatWarningsAsErrors to switch between TSLint warnings modes. Patch don't break base functionality but allows some customization. I mean that way is usefiul for people who use package.

best regards and thank you for your work

[JoshuaKGoldberg]

How do you see this interacting with https://github.com/palantir/tslint/pull/1738?

[JoshuaKGoldberg]

@Isvhome I actually really like your change! But, it needs a few things before merge:

• It should be documented in README.md
• It should have a couple tests to verify the cases
• I'll need to play around with it

If you can do the first two, I'll do the third. Otherwise I can try to get to all three.