Revisit topics that show how to use just `dotnet new` to create a project

[mairaw]

There are still a few topics that show how to use simply dotnet new to create your basic app. We need to review those to use the new syntax:

Changes to be done in the master branch:

• https://github.com/dotnet/docs/blob/master/docs/core/preview3/deploying/index.md
• https://github.com/dotnet/docs/blob/master/docs/core/preview3/tools/dependencies.md
• https://github.com/dotnet/docs/blob/master/docs/core/preview3/tools/dotnet-migrate.md
• https://github.com/dotnet/docs/blob/master/docs/core/preview3/tools/dotnet.md
• https://github.com/dotnet/docs/blob/master/docs/core/preview3/tools/index.md
• https://github.com/dotnet/docs/blob/master/docs/core/preview3/tutorials/using-with-xplat-cli-msbuild-folders.md
• https://github.com/dotnet/docs/blob/master/docs/fsharp/tutorials/getting-started/getting-started-command-line.md
• https://github.com/dotnet/docs/blob/master/docs/core/tutorials/libraries.md
• https://github.com/dotnet/docs/blob/csproj/docs/csharp/getting-started/with-visual-studio-code.md (this one has already been migrated in the csproj branch, just needs the new command syntax)
• https://github.com/dotnet/docs/blob/master/docs/csharp/tutorials/attributes.md
• https://github.com/dotnet/docs/blob/master/docs/csharp/tutorials/console-teleprompter.md
• https://github.com/dotnet/docs/blob/master/docs/csharp/tutorials/console-webapiclient.md
• https://github.com/dotnet/docs/blob/master/docs/csharp/tutorials/inheritance.md
• https://github.com/dotnet/docs/blob/master/docs/csharp/tutorials/string-interpolation.md
• https://github.com/dotnet/docs/blob/master/docs/csharp/tutorials/working-with-linq.md
• https://github.com/dotnet/docs/blob/master/docs/core/tutorials/using-on-macos.md