impl for [A; N]

Summary:
Since D56121358, `Dupe` is for all types that are cloned at constant time. Arrays are such types.

This is mostly for consistency.

Reviewed By: JakobDegen

Differential Revision: D56122515

fbshipit-source-id: 99480fdfd2c2fb564de5ac0c9e0f3235073d221f

gazebo/dupe/src/lib.rs

@@ -73,6 +73,8 @@ impl<A: Dupe, B: Dupe, C: Dupe, D: Dupe, E: Dupe, F: Dupe, G: Dupe, H: Dupe, I:
 {
 }
 
+impl<A: Dupe, const N: usize> Dupe for [A; N] {}
+
 // Atomic types
 impl Dupe for bool {}
 impl Dupe for char {}