cached crate with proc macros broken

[demoray]

With the 0.53.0 release of cached, use of the proc_macros feature no longer works, as it relies on the cached_proc_macro crate which the latest published version still uses cached::instant::Instant. The code was updated in git but not released.

[jaemk]

Sorry about that, released cached_proc_macro 0.23.0 and cached 0.53.1 to fix it