fix: update SMS messaging parse error

[mariomui]

Fixes #715

if the messageBody is malformed then there will be a json parse error since the only check to allow parse is whether the body be a string or not. If we wrap the parse in a try catch, we can code a gentler response.

• Assumptions
  • 1: Assuming that details is where the error details are located
    • I have populated the details property inside the exception object with the parse error {error: bodyParseError}. For more information, peruse the new unit test described with "should test serialize from improper json string".
    • on malformed json response_body, the exception should contain undefined properties except for message which is overwritten by the call to super.
  • 2: Assuming that the logger is catching the RestException and not another area of code:
    • Because this is an intermittent bug, i cannot be fully certain that this PR fixes the parse issue.
    • The lacking string-checking pattern is also found in other locations:
      • twilio-node/Version.ts at 5e93c1379fbcb4ea0f7bdc771597755a20950369 · twilio/twilio-node · GitHub
    • I have contained the scope of this PR to only the RestException

Checklist

• I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the Contribution Guidelines and my PR follows them
• I have titled the PR appropriately
• I have updated my branch with the main branch
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

If you have questions, please file a support ticket, or create a GitHub Issue in this repository.

[mariomui]

@childish-sambino as per request within closed PR #852 , i've submitted DI-2442 (with supporting unit test) to target the 4.0.0rc branch instead.

[beebzz]

Looks good, thanks for submitting this change!