Build(deps-dev): Bump qunit from 2.8.0 to 2.9.1

[dependabot-preview]

Bumps qunit from 2.8.0 to 2.9.1.

Release notes

Sourced from qunit's releases.

2.9.1

• Build: Fix (and add tests) missing required files in 2.9.0. (#1368)
• Build: Set "root: true" in eslintrc

2.9.0

• Assert: Report RegExp/Error as strings from rejects()/throws() (#1333)
• Build: Add macOS and Windows to the Travis CI test matrix
• Build: Update engine requirement package.json to Node 6
• CLI: Reduce size of the dependencies tree (#1342)
• CLI: Re-implement watch with node-watch instead of sane (#1342)
• HTML Reporter: Fix an unescaped details.source (#1341)

Changelog

Sourced from qunit's changelog.

2.9.1 / 2019-01-07

• Build: Fix (and add tests) missing required files in 2.9.0. (#1368)
• Build: Set "root: true" in eslintrc

2.9.0 / 2019-01-06

• Assert: Report RegExp/Error as strings from rejects()/throws() (#1333)
• Build: Add macOS and Windows to the Travis CI test matrix
• Build: Update engine requirement package.json to Node 6
• CLI: Reduce size of the dependencies tree (#1342)
• CLI: Re-implement run.watch() with 'node-watch' instead of 'sane' (#1342)
• HTML Reporter: Fix an unescaped details.source (#1341)

Commits

• d80b76c 2.9.1
• 4a0a6c3 Build: Prepare 2.9.1 release, including authors and history update
• 18581b3 Build: Fix (and add tests) missing required files in 2.9.0. (#1368)
• cbe24a4 Build: Set "root: true" in eslintrc
• d90402f Build: Updating the master version to 2.9.1-pre.
• 83d8447 Build: Prepare 2.9.0 release, including authors and history update
• 57cea14 CLI: Update node-watch to 0.6.0
• 08f1c69 Assert: Report RegExp/Error as strings from rejects()/throws()
• 4255f95 Tests: Fix bad test case that always passes
• 681cee7 Build: Add macOS and Windows to the Travis CI test matrix (#1360)
• Additional commits viewable in compare view

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