Update criterion to version 0.5 (#93)

This removes the dependency on `atty` fixing #33.

(cherry picked from commit b5c463e)

cedar-policy/Cargo.toml

@@ -56,7 +56,7 @@ crate_type = ["rlib"]
 # could replace this hack.
 cedar-policy = { path = ".", default-features = false, features = ["integration_testing"] }
 cool_asserts = "2.0"
-criterion = "0.4"
+criterion = "0.5"
 globset = "0.4"
 
 [[bench]]