Update `.github`

Update `.github`

v1.2.0 to fix `multiple-definitions` linker error

### Releases v1.2.0

1. Fix `multiple-definitions` linker error. Drop `src_cpp` and `src_h` directories
2. Add example [multiFileProject](examples/multiFileProject) to demo for multiple-file project.
3. Optimize library code by using `reference-passing` instead of `value-passing`
4. Update all examples

v1.1.1 to fix platform

### Releases v1.1.1

1. Fix platform in `library.json`

v1.1.0 to add support to new boards

### Releases v1.1.0

1. Add support to new boards (**ADAFRUIT_ITSYBITSY_RP2040, ADAFRUIT_QTPY_RP2040, ADAFRUIT_STEMMAFRIEND_RP2040, ADAFRUIT_TRINKEYQT_RP2040, ADAFRUIT_MACROPAD_RP2040, SPARKFUN_PROMICRO_RP2040, etc.**) using the arduino-pico core
2. Add `ISR_16_Timers_Array_Complex` examples.
3. Fix examples' bug

v1.0.1 to match arduino-pico core v1.4.0

### Releases v1.0.1

1. Update README and Packages' Patches to match arduino-pico core v1.4.0

Releases v1.0.0 to support RP2040-based boards

### Initial Releases v1.0.0

1. Initial coding to support RP2040-based boards such as RASPBERRY_PI_PICO. etc. using [Earle Philhower's arduino-pico core](https://github.com/earlephilhower/arduino-pico)