Return error from function posting to APM server

[estolfo]

We are currently continuing the function even if there's an error posting to the APM server. These changes return an error from the function if there's an error sending to the APM server.

Resolves #27

[ghost]

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• Start Time: 2021-09-27T13:08:39.953+0000

• Duration: 7 min 37 sec

• Commit: 35ad0e3

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Test	Results
Failed	0
Passed	6
Skipped	0
Total	6

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[astorm]

👍 explicitly handling the error is worth getting into the extension and this does that, approving.