Add rand etc to deny.toml

deny.toml

@@ -249,6 +249,16 @@ deny = [
 # Certain crates/versions that will be skipped when doing duplicate detection.
 skip = [
     #{ name = "ansi_term", version = "=0.11.0" },
+
+    # ed25519-dalek and proptest have conflicting rand deps,
+    # where ed25519-dalek is on an older revision.
+    # proptest is only used as a dev-dependency,
+    # so this conflict should not cause extra bloat to contracts.
+    # Below are the newer version numbers required by proptest.
+    { name = "rand", version = "0.8" },
+    { name = "rand_core", version = "0.6" },
+    { name = "rand_chacha", version = "0.3" },
+    { name = "getrandom", version = "0.2" },
 ]
 # Similarly to `skip` allows you to skip certain crates during duplicate
 # detection. Unlike skip, it also includes the entire tree of transitive