v1.19.0

PowerSystems v1.19.0

Diff since v1.18.5

Closed issues:

• copy_time_series! signature inconsistent with IS definition (#860)

Merged pull requests:

• Add get_components method with filter_func (#858) (@daniel-thom)
• Fix Saturation calculations (#859) (@rodrigomha)
• Use IS.copy_time_series! directly (#861) (@daniel-thom)