fix(style): nightly clippy

[zleyyij]

This change makes nightly clippy happy by making the below style change where necessary:

-        let ll_code = if scratch.ll_rle.is_some() {
-            scratch.ll_rle.unwrap()
+        let ll_code = if let Some(ll_rle) = scratch.ll_rle {
+            ll_rle
         } else {
             ll_dec.decode_symbol()
         };

It also removes unix specific dependencies for the CLI so that it works on Windows.

[KillingSpark]

Oh nice, thanks!