Prefers "range-to-inclusive" for compression level argument validation

src/main.rs

@@ -89,7 +89,7 @@ fn main() {
     builder.parse_default_env();
     builder.init();
 
-    if !(0..10).contains(&args.compression_level) {
+    if !(0..=9).contains(&args.compression_level) {
         error!("unsupported compression level : {}", args.compression_level);
         process::exit(2);
     }