Add methods for `sind` and etc.

[goretkin]

Currently it falls back to sind(::Real) defined in Base:

julia> sind(interval(0, 0))
ERROR: rem not defined for IntervalArithmetic.Interval{Float64}

[dpsanders]

This should be pretty easy: just divide (or multiply?) by interval pi?

[goretkin]

Ideally it would benefit from https://github.com/JuliaIntervals/IntervalArithmetic.jl/pull/421 to avoid the same issues.