v0.13.5

McCormick v0.13.5

Diff since v0.13.4

Closed issues:

• Add x|x| relaxation (#25)
• Add logcosh(x) = log(cosh(x)) function (#37)
• exp(x::MC) contains NaNs when x is degenerate (#60)

Merged pull requests:

• Update MCCallback and remove unused types warning (#59) (@DimitriAlston)
• Update convex_increasing.jl (#61) (@DimitriAlston)
• v0.13.5 Update (#62) (@DimitriAlston)