@azure/core-rest-pipeline broken for Node.js 14

[saravanan-sb]

• Package Name: @azure/core-rest-pipeline
• Package Version: 1.9.1
• Operating system:
• nodejs
  • version: 14.21.3

Describe the bug
Attempting to import SDK results in an exception caused by syntax that's not supported in node 14:
SyntaxError: Unexpected token '??='

To Reproduce
Steps to reproduce the behavior:
npm i @azure/core-rest-pipeline

To get the following error

`/[...]/node_modules/@azure/core-rest-pipeline/dist/commonjs/policies/multipartPolicy.js:99`
            `boundary ??= parsedBoundary;`
                     `^^^`

`SyntaxError: Unexpected token '??='`

Expected behavior
Since previous version of the package did support node 14, the new version should either stay backwards compatible or be published as a major release.

Additional context
I ended up here by debugging a problem with @azure/web-pubsub which used to work for me until yesterday and now it suddenly broke because of the reason explained above

A possible solution for this would be to publish a patch for @azure/core-rest-pipeline with the syntax reverted to a more compatible version.

[github-actions]

@jeremymeng @maorleger @mpodwysocki

[github-actions]

Thank you for your feedback. Tagging and routing to the team member best able to assist.

[maorleger]

hey @saravanan-sb thanks for reaching out - this looks to be the same issue currently tracked in #28918 - going to close this as dupe to keep conversation in a single thread. Please do review #28918 for suggestions 👍