v3.40.0

LinearSolve v3.40.0

Diff since v3.39.2

Merged pull requests:

• Make length of Partials known at compile time in ForwardDiff overloads (#727) (@jClugstor)
• Hotfix typo in linearsolveautotune (#774) (@ChrisRackauckas)

Closed issues:

• Add a way to forward diff a function that uses linsolve inside (#646)
• LU algorithms that work when solving a linear system fail in autotune_setup (#771)