Revert "Pin System.ValueTuple to 4.5.0"
Revert "Pin System.ValueTuple to 4.5.0"

This reverts commit 1497f153392025656d0f813dad84aae3ed0eac09.

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