fix: Make completion field public and remove unused import

Author: code-inflation

src/lib.rs

@@ -6,7 +6,6 @@ use std::fmt;
 use std::fmt::Display;
 
 use clap::Parser;
-use clap::ValueEnum;
 use clap_complete::Shell;
 use speedtest::PayloadSize;
 
@@ -85,7 +84,7 @@ pub struct SpeedTestCLIOptions {
 
     /// Generate shell completion script for the specified shell
     #[arg(long = "generate-completion", value_enum)]
-    completion: Option<Shell>,
+    pub completion: Option<Shell>,
 }
 
 impl SpeedTestCLIOptions {