playing around with `Factorizations` I noticed a bug ``` julia> print(factor(24)) Primes.Factorization(2 => 3, 3 => 1) julia> Primes.Factorization(2 => 3, 3 => 1) ERROR: MethodError: no method matching Primes.Factorization(::Pair{Int64, Int64}, ::Pair{Int64, Int64}) Stacktrace: [1] top-level scope @ REPL[3]:1 ``` you should either print `factor(24)` as `Primes.Factorization(Dict(2 => 3, 3 => 1))` or add a method `Primes.Factorization(l::Pair{T,Int}...) where T=Primes.Factorization(Dict(l))` so that one can round-trip a `Factorization`