I was checking the crate

1. it looks like we can get rid of generic-array - checked with cargo shear

2. Features combinations

   I was testing multiples features with

   cargo hack test --feature-powerset --all-targets
   # or better with
   cargo hack test --feature-powerset --all-targets --exclude-features _bzip2_any,_arbitrary,_deflate-any,_all-features

   And it seems that

   cargo test --all-targets --no-default-features

   Is failing (for the benchmarks) because i think we need to:

   • the std feature for getrandom devpendencies.
     or
   • change the errors of getrandom since without std it doesn't implement std::io::Error

3. Private features

   This command is failing

   cargo test --all-targets --no-default-features --features _bzip2_any

   this is normal since it's "private" but maybe we should remove the "private" featureS no ?

4. _all-features feature seems useless