v1.16.0

LinearSolve v1.16.0

Diff since v1.15.0

Closed issues:

• error with 1.8beta3 (#124)
• b expects matrix as opposed to vector (#129)

Merged pull requests:

• Update custom.md (#121) (@vpuri3)
• Update solvers.md (#122) (@vpuri3)
• fix outdated comment (#125) (@vpuri3)
• Remove Requires.jl and make a multi-package setup (#130) (@ChrisRackauckas)