I would like to fit Dirichlet Distribution to `all_patterns`

using MLE in the Distributions package

where alpha to Dirichlet is `fill(1,k)`

and `all_patterns`

is a combination array

```
all_patterns = (p=(a,c)->c<2 ? a : [[x;y] for x=a for y=p(a,c-1)])(0:1,K)
all_patterns = convert(Array,VectorOfArray(all_patterns)')
```

and this is what I tried [but not working ]

`fit_mle(Dirichlet,fill(1,K),all_patterns)`

using the modified interface specified here: https://juliastats.org/Distributions.jl/stable/fit/