Blank response when streaming files through but when singular file is sent transcription is received

[Joll59]

Describe the bug
When utilizing the multiple file transcription method in the service, you sometime receive empty response string, but if the same file is sent through without using the multiple file transcription methods you get a string response back.

To Reproduce
Steps to reproduce the behavior:

1. Start with a collection of audio files
2. Utilize the multiple file transcription methods/classes to transcribe the audio files
3. Error shows up in the form of empty response strings from the service.

Expected behavior
Files are transcribed equally whether via streaming or singular file transcription.

Desktop (please complete the following information):

• OS: Win 10
• Version
  • Node 12.2.0
  • package
    • d-ser-t-service: 1.2.0

Additional context
Possibility exists this is a service issue.

[zanawar]

May be fixed by #86