Incorrect gmres!-call in GMRESLinSolver's lin_solve #270
Description
In 2020, IterativeSolvers.jl switched from a single tolerance (tol) to support for a combination of absolute (abstol) and relative tolerance (reltol). The current implementation of GMRESLinSolver at line 186 of Linsolvers.jl still assumes the old keyword argument of tol.
This commit from IterativeSolvers.jl introduced the change in 2020. At that point, providing tol was still supported but deprecated. At this time, using tol results in an error.
As I'm assuming tol initially represented a relative tolerance, the quickest change would just be to change tol=tol to reltol=tol on line 186.