Update ember-cli-qunit to version 2.0.0 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

ember-cli-qunit just published its new version 2.0.0, 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 8 commits .

• a24fbc2 Release v2.0.0.
• e5378ba Merge pull request #113 from trentmwillis/test-loader
• 115d56b Allow ember-cli-test-loader from NPM or Bower
• 865729c Merge pull request #114 from Turbo87/extract-jshint
• 425a26e Remove JSHint lintTree
• 990cab9 Release v1.4.1.
• 6ebe3ca Merge pull request #112 from trentmwillis/test-loader-fix
• 791a85f Do not require upgrading test-loader

See the full diff.

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