Update dependency ember-concurrency to v5

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ember-concurrency	4.0.6 -> 5.1.0

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Release Notes

machty/ember-concurrency (ember-concurrency)

v5.1.0

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• The EC Babel async arrow function transformer now prunes imports that become unused after applying the transform so that Rollup doesn't complain about unused imports. (#​595)

v5.0.1

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• Reverted required Node.js version requirements
• Removed internal references to ember/object get() and computed

v5.0.0

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• Breaking Changes
  • Removed a number of features that were overloaded, dependent on Ember Object, TypeScript-unfriendly, and/or otherwise likely to cause problems with future/Polaris Ember
  • Some of these features were already explicitly or soft-deprecated (removed from docs or otherwise discouraged)
  • Removed features include:
    • Removed lifecycle events, e.g. firing taskName:started, taskName:errored
    • Removed Task Groups
    • Removed support for any Task construction other than via async arrow fn
      • e.g. task(function * () {}) not supported
    • Removed all decorator-based APIs, e.g. @task * foo() { ... }
    • Removed encapsulated tasks
    • Removed Ember.ENV.DEBUG_TASKS
      • This may be reinstated by some other means if there is interest. In the meantime you can continue to use {debug:true} for debugging logging on specific tasks of interest

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