get cargo pkg version from env

src/main.rs

@@ -19,7 +19,7 @@ fn main() -> anyhow::Result<()> {
         if arg != "-v" {
             return Err(anyhow!("usage: rwm [-v]"));
         } else {
-            println!("version goes here ;P"); // TODO: Sus out version info from cargo
+            println!(env!("CARGO_PKG_VERSION")); // TODO: test this
             return Ok(());
         }
     }