Order cancellation not performed

[Third](https://github.com/alpacahq/Alpaca-API/issues/64) [time](https://github.com/alpacahq/Alpaca-API/issues/72) hopefully is a charm...

Here is a trace of attempted order deletion.
```
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/d7bf596dd6c54efd8342d566fd9a71f3
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/1985c2af0e554bb0b599157ee4e5e239
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/7d19a8d874734d12b7337976a3c46e9a
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/5543edee2e1342b7832a74cf889d75b3
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/578557f870a2413a87f69379a7328f87
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/39eef2f1ce954415841a050696a08448
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/7a210e370897441ba8fce3c49aecff3b
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/14d601e1e9fc435eb8806d53261e5436
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/4454adf0917a4c3599a509441622a607
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/81eb8c23d2bf47c1a7c2aa7b0a88e512
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/c2ab0339d675424a80551826df9afc78
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/3234770add79497e822cdc47feba3977
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/f715b42b103043f0b4233d041c86a09c
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/3bb4288921064d2bb110b813556eeaaa
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/eb7ae6a0cec343228a97dccc793cb707
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/14cc120c234f454ea97d2f4968454183
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/10c4e8e3e7334dc5a6415f16713d0aba
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/1cfc3f6727cd4ecaba4ac2c1a1458ec2
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/f17b205517934deba5f386f60a862446
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/c67ad41cb7304111848e2aa5f74d25d5
HTTP request: DELETE to https://paper-api.alpaca.markets/v2/orders/1db2a7bb32bc48cbaebb8932a1409a02
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
HTTP status: 204 No Content
```

Once again all requests were successful. Yet, nothing has happened. The orders are still there in the dashboard and visible through the API.