scrap: rename coder.rs to codec.rs

Signed-off-by: 21pages <pages21@163.com>

src/client.rs

@@ -13,7 +13,7 @@ use cpal::{
 };
 use magnum_opus::{Channels::*, Decoder as AudioDecoder};
 use scrap::{
-    coder::{Decoder, DecoderCfg},
+    codec::{Decoder, DecoderCfg},
     VpxDecoderConfig, VpxVideoCodecId,
 };