I like writing my imports / using statements in the following style:

```
import CairoMakie
import CSV
import HDF5
import KernelDensity
import Makie
import StatsBase
using DataFrames: DataFrame
using Distributions: Gamma
using Distributions: logpdf
using Distributions: pdf
using Distributions: Poisson
using LinearAlgebra: Diagonal
using LinearAlgebra: eigen
using Makie: @L_str
using NaNStatistics: nanmean
using NaNStatistics: nansum
using ProgressMeter: @showprogress
using Random: bitrand
using Statistics: cor
using Statistics: mean
using Statistics: middle
using StatsBase: countmap
```

Thus, each `using`

(for each symbol) and each `import`

goes in its own line, and lines are sorted alphabetically.

Can I write a JuliaFormatter spec to help me enforce this style?