Merge pull request #52 from mruby-esp32/add_ADC_class

Add ADC class.

Merge pull request #51 from mruby-esp32/add_mruby-esp32-spi

Add SPI class.

Merge pull request #45 from mruby-esp32/cleanup

Cleanup

Merge pull request #44 from mruby-esp32/gpio_gem_update

Add the new esp_adc component for the updated GPIO gem

Fix CI action?

Merge pull request #39 from mruby-esp32/add_timer

Added ESP32::Timer sample

Merge pull request #38 from yuuu/add_mruby-esp32-gpio

Added mruby-esp32-gpio.

Merge pull request #37 from yuuu/update_mruby_3.2

Update mruby 3.2.0.

Merge pull request #36 from yuuu/build_image_with_actions

Build images for distribution with GitHub Actions.