v1.15.0

ControlSystems v1.15.0

Diff since v1.14.0

• Add Makie recipes

Merged pull requests:

• optionally return additional arguments from lqr and kalman (#994) (@baggepinnen)
• improve robustness of hinfnorm (#1015) (@baggepinnen)
• add a few error hints for factorizations on exotic number types (#1016) (@baggepinnen)
• marginplot to support frequency display in Hertz (#1017) (@baggepinnen)
• Add Makie recipes for all plots (#1018) (@baggepinnen)

Closed issues:

• marginplot doesn't support the hz keyword argument (#827)
• hinfnorm failure case (#1014)