refactor: Rename default_type to default_compression_type

src/compression_engine.rs

@@ -141,7 +141,7 @@ pub fn get_compression_engine(compression_type: CompressionType) -> Result<Box<d
     }
 }
 
-pub fn default_type() -> CompressionType {
+pub fn default_compression_type() -> CompressionType {
     let mut default = CompressionType::None;
     for compression_type in CompressionType::iter() {
         let compression_engine = get_compression_engine(compression_type.clone()).expect("Missing engine");