replace ref_thread_local::ref_thread_local! with std::thread_local!

removes `ref_thread_local` which was still at 0.0.0 released October 2018 while latest 0.1.1 was released mid November 2021

fixes libraries.rs UB

build/main.rs

@@ -82,8 +82,8 @@ use indexmap::IndexMap;\
     writeln!(
         libraries,
         "\
-ref_thread_local::ref_thread_local! {{
-    pub(crate) static managed LIBRARIES: IndexMap<&'static str, &'static str> = {{
+std::thread_local!{{
+    static LIBRARIES: IndexMap<&'static str, &'static str> = {{
         let mut m = IndexMap::new();"
     )
     .unwrap();