v0.22.1

JuMP v0.22.1

Diff since v0.22.0

Closed issues:

• LoadError after updating from version 0.21.10 to 0.22.0 (#2799)
• Optimizer Attributes Not Standardized (#2805)
• Export MOI.OptimizationSense (#2807)
• define Base.isempty or is_empty for JuMP models (#2810)

Merged pull requests:

• Remove release notes from PDF (#2796) (@odow)
• Rewrite manual/variables.md (#2798) (@odow)
• Fix bug in containers with tuple indices (#2800) (@odow)
• Fix egregious typo in error message (#2801) (@odow)
• [docs] rewrite manual/constraints.md (#2802) (@odow)
• [docs] update Should I use JuMP (#2803) (@odow)
• [docs] tidy and extend page on AMLs (#2804) (@odow)
• Fix bug in set_time_limit_sec (#2806) (@odow)
• Export OptimizationSense enum from MOI (#2808) (@odow)
• adding Base.isempty(::Model) (#2811) (@matbesancon)
• [docs] add design patterns tutorial (#2812) (@odow)
• Prep for 0.22.1 release (#2813) (@odow)