2.6.0

• Core: Ensure late-add high-priority tests are inserted in proper order
• CLI: Implement --require option
• Test: Refactor startError test to not reload QUnit
• Core: Throw error if no tests are run
• Assert: Support rejecting falsy values against no matcher in rejects
• Assert: Clone actual steps array to avoid passing internal reference
• Test: Add failing test for verifySteps passing reference to log
• Docs: Note that non-string values fail assert.step()
• Assert: Fail test when passing a non string value to assert.step
• Core: Extract currently running test out of config.queue into internal testQueue (#1260)