JuMP v1.2.1

Diff since v1.2.0

Closed issues:

• [docs] Clarify String singleton as an iterable object for @variable (#3042)

Merged pull requests:

• [docs] clarify singleton set confusions (#3044) (@odow)
• Fix parsing of double-sided nl constraints (#3045) (@odow)
• Prep for v1.2.1 (#3046) (@odow)