v0.2.0

• Expand the ArduinoUNO API with PWM, microsecond delays, millis/micros timing, pulse measurement, serial I/O, shift helpers, and interrupt control
• Add special code generation for serial_print and serial_println so string and integer values map to the correct runtime functions
• Add an HC-SR04 ultrasonic distance sensor example

v0.1.3

• Add the built-in ArduinoUNO prelude with FFI-backed GPIO, analog read, and millisecond delay bindings
• Replace the legacy system("pin13:*") sketch API with top-level helpers like pin_mode, digital_write, and delay_ms
• Update the default hello example to use the new ArduinoUNO API

v0.1.2

• Update vendored Spinel revision

v0.1.1

• Fix avrdude discovery for installed command

v0.1.0

First release with working rubyduino hello.rb command.