message: [core] Add `&self` to `random_seed` getter
  bugbugbug
diff: @@ -256,7 +256,7 @@ impl TestEnvData {
  }
  /// Returns the random seed for the contract invocation.
  - pub fn random_seed() -> Vec<u8> {
  + pub fn random_seed(&self) -> Vec<u8> {
  self.random_seed.clone()
  }
  