attr fixes

roboplc-derive/Cargo.toml

 [package]
 name = "roboplc-derive"
-version = "0.1.5"
+version = "0.1.6"
 edition = "2021"
 authors = ["Serhij S. <div@altertech.com>"]
 license = "Apache-2.0"

roboplc-derive/src/lib.rs

@@ -340,6 +340,8 @@ pub fn worker_opts_derive(input: TokenStream) -> TokenStream {
                                     panic!("Invalid cpu value: {}", value);
                                 }
                             }
+                        } else {
+                            panic!("Unknown attribute: {:?}", path);
                         }
                     }
                 }