Parquet-rs 0.3.0 no longer builds with latest Rust nightly

[andygrove]

I can no longer build DataFusion with latest nightly because it depends on parquet-rs 0.3.0 which no longer builds.

I see that the latest code builds fine. Will there be another release soon?

warning: use of deprecated item 'rand::Rand': replaced by distributions::Standard                                
   --> src/data_type.rs:318:29                                                                                   
    |                                                                                                            
318 |     + ::std::clone::Clone + Rand + AsBytes;                                                                
    |                             ^^^^                                                                           
                                                                                                                 
error[E0277]: the trait bound `rand::distributions::Standard: rand::distributions::Distribution<<T as data_type::DataType>::T>` is not satisfied
  --> src/util/test_common.rs:42:9                                                                               
   |                                                                                                             
42 |     rng.gen::<T::T>()                                                                                       
   |         ^^^ the trait `rand::distributions::Distribution<<T as data_type::DataType>::T>` is not implemented for `rand::distributions::Standard`
   |                                                                                                             
   = help: consider adding a `where rand::distributions::Standard: rand::distributions::Distribution<<T as data_type::DataType>::T>` bound
                                                                                                                 
error[E0277]: the trait bound `rand::distributions::Standard: rand::distributions::Distribution<T>` is not satisfied
  --> src/util/test_common.rs:82:21                                                                              
   |                                                                                                             
82 |     result.push(rng.gen::<T>());                                                                            
   |                     ^^^ the trait `rand::distributions::Distribution<T>` is not implemented for `rand::distributions::Standard`
   |                                                                                                             
   = help: consider adding a `where rand::distributions::Standard: rand::distributions::Distribution<T>` bound   
                                                                                                                 
error: aborting due to 2 previous errors                                                                         

[xrl]

Please try my branch and let me know if it introduces any regressions!

[sadikovi]

Related to #160. We just need to release a new version.
ping @sunchao. I think the current state of the master is more or less okay for the release. It seems like it could have been caused by changes in rust nightly.

[sunchao]

Yes we should release parquet-rs 0.4 soon. I'll create an issue for this and hopefully can resolve it quickly.

[sunchao]

@andygrove 0.4.0 just released. Can you update the version and let us know if it works now?