message: Mentioned SLISolver change in CHANGELOG
diff: Version 4.1.1 (development)
  ===========================
  +Miscellaneous
  +-------------
  +- In SLISolver, changed the residual inner product from (Br,r) to (Br,Br) so the
  + solver can work with non-SPD preconditioner B.
  +
  Version 4.1, released on March 10, 2020
  =======================================
  