v2.0.0-beta.5

Changelog:

• Disable pin_speaker as a valid argument to play() pin argument in music/audio/speech (#63)
  • This pin can still use its own methods, like the PWM functionality
• Improves buffering and flow control to the audio mixer (#47)
• Updated CODAL to v0.2.25
  • Stability improvements with UART
  • Stability improvements with I2C
  • Improved accuracy of tone generation
  • Fixed timer resolution
  • Fixed issue in GPIO edge events
  • Added BLE Partial Flashing support for MicroPython
  • Fixed GPIO default pull mode to match V1