Update ember-cli-qunit to version 1.2.4 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

ember-cli-qunit just published its new version 1.2.4, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of ember-cli-qunit – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 48 commits .

• 87082fb Release v1.2.4.
• 0767da2 Take 3. Grrrrr.
• 502479a Release v1.2.3.
• 770c4c2 Fix stupid mistake.
• 3dabc17 Release v1.2.2.
• 827dc55 Merge pull request #102 from rwjblue/disable-linting-when-linting-addon-exists
• 0c00349 Disabling JSHint linting when linting addon exists.
• a0c5063 Release v1.2.1.
• 6545c2b Merge pull request #99 from rwjblue/fix-1-2-release
• 6743155 Fix issues with 1.2.0+ and ember-cli@2.2.0-beta.{1,2}.
• ad0b572 Merge pull request #97 from bitaculous/fix_included
• eeb9037 Usethis._super.included.call(this, target)inincluded.
• 2955c96 Release v1.2.0.
• 72874d7 Merge pull request #93 from rwjblue/move-qunit-to-npm
• 958e8b3 Make QUnit an NPM dep.

There are 48 commits in total. See the full diff.

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