Needs `dotnetcore` runtimes

[TooTallNate]

Name	Identifier	Languages
.NET Core 2.1	dotnetcore2.1	C#, PowerShell Core 6.0
.NET Core 2.0	dotnetcore2.0	C#
.NET Core 1.0	dotnetcore1.0	C#

• https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html
• https://docs.aws.amazon.com/lambda/latest/dg/dotnet-programming-model.html
• https://docs.aws.amazon.com/lambda/latest/dg/powershell-programming-model.html