Nexmo/api-specification no longer exists

[ovidiuenache]

As part of the test suite, we are using https://github.com/Nexmo/api-specification/tree/master/definitions to fetch example in the specProvider method of the OpenApiTest.php class. That repository no longer exists and the test fails.

I'll create a PR to fix this.

[ovidiuenache]

#202

[ovidiuenache]

cc @cebe

[cebe]

fixed on master by forking the repo. Thanks for reporting!