TypeError when using Bull < v3.15.0

[gabegorelick]

When using versions of Bull before queue.isPaused was added (OptimalBits/bull@19c7e44, which was first released in https://github.com/OptimalBits/bull/blob/develop/CHANGELOG.md#v3150), you'll get the following error when clicking into a queue:

(node:28760) UnhandledPromiseRejectionWarning: TypeError: queue.isPaused is not a function
    at Object.isPaused (~/node_modules/bull-arena/src/server/views/helpers/queueHelpers.js:50:18)
    at handler (~/node_modules/bull-arena/src/server/views/dashboard/queueDetails.js:28:35)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
(node:28760) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:28760) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Arena should either make it explicit that older versions of Bull are not supported or it shouldn't rely on queue.isPaused.