Export BlockSize to the root namespace

In preparation to the pub cleanup.

src/bin/common.rs

@@ -10,7 +10,6 @@
 use crate::muxer::{create_muxer, Muxer};
 use crate::{ColorPrimaries, MatrixCoefficients, TransferCharacteristics};
 use clap::{App, AppSettings, Arg, ArgMatches, SubCommand, Shell};
-use rav1e::partition::BlockSize;
 use rav1e::*;
 
 use std::fs::File;

src/lib.rs

@@ -60,6 +60,7 @@ pub use crate::header::*;
 pub use crate::util::{CastFromPrimitive, Pixel};
 
 pub use crate::frame::Frame;
+pub use crate::partition::BlockSize;
 
 /// Version information
 ///