Bump version to v1.3.1

Fix k_ticks_get_64()

Bump AVRTOS version to 1.2.1

* Edit changelogs

Bump AVRTOS version to 1.2.0

Bump arduino library version to 1.1.0

Final changes before release 1.0.0

- Fix piogen.py and regenerate platform.ini
- Introduce an inline API for gpio drivers named "gpiol".
- Add sample to be used with a button
- Introduce CONFIG_KERNEL_SILENT_FAULTS
- Introduce __fault_hook for debug purposes
- Add samples for Arduino
- Introduce function serial_init_baud()
- Introduce led_get()
- Introduce k_thread_set_priority()
- Introduce CONFIG_SERIAL_USART_BAUDRATE
- Add script to automatically generate Arduino samples for PIO ones
- Add philosopher example for arduino
- Add guards to prevent user to call k_yield_* from k_event or k_timer handlers.
- Add CONFIG_KERNEL_SYSCLOCK_PERIOD_US and CONFIG_KERNEL_TIME_SLICE_US to arduino configuration
- Add support for GPIO debug of kernel
- Introduce new asserts
- Shorten assertion failed message
- Update readme.md
- Remove .editorconfig
- Improve Makefile
- Add requirements.txt
- Remove old arduino sample