v0.3.2

DisjunctiveProgramming v0.3.2

Diff since v0.3.1

Closed issues:

• Are mixed-integer constraints allowed inside a disjunct? (#25)
• Big-M Tightness (#42)
• checking proposition expressions fails (#45)
• Error when adding disjunctions in a loop with EqualTo constraints (#46)
• Checking variables in a constraint (#53)
• infer_bigm without parsing expressions or using IntervalArithmetic (#55)