v0.21.2

PowerModels v0.21.2

Diff since v0.21.1

Merged pull requests:

• Fix docstring of DCPPowerModel (#911) (@odow)
• Improve performance of calc_connected_components (#914) (@mtanneau)
• Add in-place conversion to basic data format (#915) (@mtanneau)
• No deepcopy when renumbering components (#916) (@mtanneau)
• Update psse parser for 3winding transformers (#917) (@hei06j)
• Release v0.21.2 (#919) (@ccoffrin)
• CI Fix (#922) (@ccoffrin)

Closed issues:

• use of Pandapower network in PowerModels.jl (#909)
• Documentation: DCPPowerModel description text (#910)