v1.11.2

ControlSystems v1.11.2

Diff since v1.11.1

Merged pull requests:

• do not promote system type when creating a vector (#958) (@baggepinnen)
• remove some dependencies (#959) (@baggepinnen)
• move DSP to an extension (#960) (@baggepinnen)
• Fix negative phase margin (#962) (@baggepinnen)
• Extend docstring (#963) (@CasBex)
• Export PID conversion functions (#964) (@baggepinnen)
• allow more discretization methods in lsim (#966) (@baggepinnen)
• add backward euler discretization (#967) (@baggepinnen)
• add Padé approximation with different numerator and denominator degree (#968) (@baggepinnen)
• handle phase wrapping in margin (#969) (@baggepinnen)
• tweak computation of integrator excess (#970) (@baggepinnen)

Closed issues:

• margin() gives incorrect phase margin for system with negative margin (#961)