Fix async invocation in Python 3

[suriya]

Description

Removed the encoding of the json message for SNS notification when sys.version is Python 3.

See Miserlou/Zappa#1331

This issue and similar pull request have been open for more than three years. Please accept and merge them into Zappa.

GitHub Issues

Miserlou/Zappa#1323

[luistm]

LGTM

[wangsha]

I had the same issue and confirm this solution works.

[coveralls]

Coverage remained the same at 73.521% when pulling d21531e on suriya:fix-sns-task-1 into ddc3fbb on zappa:master.

[hellno]

Looks great 👍🏽 Thanks for the contribution

[kornpow]

Just hit this error today, cant wait for the merge!

[kornpow]

I was able to build this into a wheel and test it out! Once I got it installed properly I was able to get my function to call SNS

@task_sns
def longrunner(delay, msg):
    sleep(float(delay))
    return f"testing task: {msg}"