Re-add bench feature

hdevalence · hdevalence · commit 15a226915a50 · 2019-12-06T10:39:11.000-08:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -33,3 +33,4 @@ sha2 = "0.8"
 [features]
 nightly = ["curve25519-dalek/nightly"]
 debug-transcript = ["merlin/debug-transcript"]
+bench = []
