v2.1.0

Deployed to:

• https://python.microbit.org
• https://python.microbit.org/v/2
• https://python.microbit.org/v/2.1

Changelog:

• Update MicroPython to the v2.0.0-beta.1 release
• Updated microbit-fs to v0.9.0 release
• Removed microbit-universal-hex library as microbit-fs generates Universal Hexes
• Universal Hex generated with board ID 9901 for the v1 section
• Translation system updated to be more robust to missing translations
• Minor reorganisation of some js files