message: Change out tests to use new API
diff: @@ -23,12 +23,7 @@ fn customer_create_and_delete_without_account() {
  #[cfg(feature = "blocking")]
  fn customer_create_and_delete_with_account() {
  mock::with_client(|client| {
  - let client = client.to_owned().with_headers(stripe::Headers {
  - stripe_account: Some("TEST".into()),
  - client_id: Some("ca_123".into()),
  - stripe_version: Some(stripe::ApiVersion::V2019_03_14),
  - user_agent: "Stripe Test".into(),
  - });
  + let client = client.to_owned().with_client_id("ca_123").with_stripe_account("TEST");
  customer_create_and_delete(&client);
  });
  }
  