Updating BuildTools from 2.1.3-rtm-15812 to 2.1.3-rtm-15813
Updating BuildTools from 2.1.3-rtm-15812 to 2.1.3-rtm-15813

[auto-updated: buildtools]

aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore