feat: preserve long stack traces in environments that support them

[ForbesLindesay]

No description provided.

[coveralls]

Coverage increased (+1.4%) to 100.0% when pulling f6c9bde on feat/long-stack-traces into 6b75d94 on master.

[rollingversions]

Change Log for throat (5.0.0 → 6.0.0)

Breaking Changes

• Throat no longer supports overriding the Promise implementation

  If you need to support older browsers, you should use a global polyfill. If you want throat to return a different type of Promise, you should manually wrap the result using CustomPromise.resolve(...)

• Older browsers are no longer tested, although most will continue to work if you include a polyfill for Promise

  We are still testing on:

  • Microsoft Edge version 15
  • Google Chrome version 55
  • Firefox version 52
  • Safari version 12
  • iOS Safari version 11

• Node.js version 8 is no longer tested, although it will probably continue to work

New Features

• Environments that support async stack traces will now show the full stack trace when using throat. Previously throat calls effectively cut the stack trace off at that call.

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