Plain text error output from xcrun is not handled

[jasonrm]

The JSON parsing of the xcrun output added in #173 doesn't handle an unaccepted program license agreement with Apple.

with v2.2.1

  ⨯ Unexpected token E in JSON at position 0  failedTask=build stackTrace=SyntaxError: Unexpected token E in JSON at position 0
    at JSON.parse (<anonymous>)
    at /Users/runner/work/repo/node_modules/@electron/notarize/src/notarytool.ts:79:25
    at Generator.next (<anonymous>)
    at fulfilled (/Users/runner/work/repo/node_modules/@electron/notarize/lib/notarytool.js:28:58)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)

with v2.1.0

  ⨯ Failed to notarize via notarytool
Error: HTTP status code: 403. A required agreement is missing or has expired. This request requires an in-effect agreement that has not been signed or has expired. Ensure your team has signed the necessary legal agreements and that they are not expired.
  failedTask=build stackTrace=Error: Failed to notarize via notarytool

[JamesS-M]

I'm experiencing this same problem.

[ericvanbuhler]

I'm experiencing the same issue on v2.3.0

[Makio64]

same issue here

[yingchen-liu]

Same here

[rotu]

This should be fixed by #191