[SP140] Tweak button double tap timing. Update dependencies

• Tweak button double tap timing for more reliable arm/disarm. (Max time between taps = 600ms)
• Update libraries

[SP140] Public release

Bump to version 5.1

Since rc2:

• Faster ESC "arming"
• Updated ESC endpoints
• Use ring buffer to average out voltage and throttle
• Fix bootloader screen visibility

[SP140] Initial Release

Highlights

• New button layout
• New color screen
• SP140 ESC telemetry parsing
• Built-in barometer support
• Cruise control

[SP140] beta

v4.2.0-rc1

Update README.md

Minor version bump for Batch 6.

Mostly just dependency library updates

Batch 5 - WebUSB, Alt & Temp, UF2 support

Highlights

• Support for WebUSB with JSON
• Read and display altitude and temperature from hub.
• Saving and retrieving preferences and settings from EEPROM
• UF2 bootloader support
• Refactor code into multiple files for better organization

Batch 4 Support

Highlights:

• Hub telemetry support
• EEPROM flight hour logging
• Threading
• Error detection (watchdog)

Code cleanup

Library updates
Vibration control function
Cleanup init

Batch 3 controller support

Adds support for

• 2nd button
• haptic motor
• 32 bit SAM processor

Ships with batch 3

Initial Release

• Basic safety features
• Battery percentage estimation using custom PCB
• LED screen support
• Faster arm/disarm
• Buzzer support

Ships with Batch 2