feat: v0.1.1, support width and pem feature

src/cmd_base58.rs

@@ -19,7 +19,7 @@ pub struct CmdBase58 {
 }
 
 impl CmdExec for CmdBase58 {
-    fn exec(&self) -> XResult<()> {
+    fn exec(&mut self) -> XResult<()> {
         if self.encode && self.decode {
             return simple_error!("Encode and decode cannot both assigned.");
         }