Fix order in which values returned by inverse link are captured

[ajinkya-k]

In GLM v 2.0 the order of return values for the function inverselink(<:Link01) was changed for consistency and alignment with documented API. This affects the following lines:

BetaRegression.jl/src/BetaRegression.jl

Line 453 in c4ca83c

μᵢ, omμᵢ, dμdη = inverselink(link, η[i])

BetaRegression.jl/src/BetaRegression.jl

Line 499 in c4ca83c

μᵢ, omμᵢ, dμdη = inverselink(link, ηᵢ)

BetaRegression.jl/src/BetaRegression.jl

Line 704 in c4ca83c

μ, _, dμdη = inverselink(link, η)

This function is also used in precisioninverselink but I don’t think it uses Link01 so it should not be a problem.

I will send a PR to fix these soon

[ajinkya-k]

the compat section may need some work. @ararslan I will need help with that part.