Release 1.2.0

🚀 Enhancement

• task(TestWaiter): Add public API for clearing waiter items (dc15392)
• task(Build): Ensures that there can only be one active ember-test-waiters addon in builds (#86) (9ab9640)

🏠 Internal

• task(release): Adding release-it configuration (68b7d54)
• task(CI): Refining when CI Build runs (8983354)
• Converting to use github actions (#88) (bee3c8c)
• task(README): Updating badges (#61) (873f7d5)
• task(deps): Pinning engine.io to specific version (d1121a7)