v0.4.1

NLPModelsModifiers v0.4.1

Diff since v0.4.0

Closed issues:

• Maximize SlackModel (#19)

Merged pull requests:

• [AUTO] Change master to main (#22) (@abelsiqueira)
• [AUTO] Fix docs to use main (#23) (@abelsiqueira)
• Fix types of Quasi-Newton models (#25) (@abelsiqueira)