Update Project.toml

Author: ChrisRackauckas

benchmarks/SimpleHandwrittenPDE/Project.toml

@@ -19,7 +19,7 @@ ApproxFun = "0.13"
 DiffEqDevTools = "2.22"
 DomainSets = "0.6, 0.7"
 LSODA = "0.6, 0.7"
-LinearSolve = "2"
+LinearSolve = "2, 3"
 MethodOfLines = "0.9"
 ModelingToolkit = "8"
 ODEInterfaceDiffEq = "3.7"