Bump to 0.60 (#4892)

* WIP

* semi-revert metadata change

crates/nu_plugin_query/src/main.rs

@@ -1,6 +1,6 @@
-use nu_plugin::{serve_plugin, CapnpSerializer};
+use nu_plugin::{serve_plugin, JsonSerializer};
 use nu_plugin_query::Query;
 
 fn main() {
-    serve_plugin(&mut Query {}, CapnpSerializer {})
+    serve_plugin(&mut Query {}, JsonSerializer {})
 }