v6.44.1

OrdinaryDiffEq v6.44.1

Diff since v6.44.0

Closed issues:

• Return error code instead of throwing in ode_determine_initdt (#801)
• Call overload of solution fails using saveat at single point (#991)
• New 5(4) RK coefficients (#1601)

Merged pull requests:

• Make ExplicitRK handle stiffness detection (#1870) (@ChrisRackauckas)
• Add CONTRIBUTING.md (#1874) (@ErikQQY)