Release 6.0.0

• Fix release-it file name (51993ca)
• Readd clean script (d10bde0)
• Update README (a627b8c)
• Update eject script (925d9fa)
• Cleanup components (cb025de)
• Add speaker test (2729a5c)
• Add counter test (6235fc2)
• Achieve 100% test coverage on app.tsx (fd9d8d8)
• Add simple app unit test (4350309)
• Fix yarn installation (b63ba93)
• Redo the template project, simplify it (f856f8e)
• Add proper ci script (#81) (4bfe0bd)