v1.2.3 to fix `DutyCycle` bug, etc.

### Releases v1.2.3

1. Fix `DutyCycle` bug. Check [float precisison of DutyCycle only sometimes working #3](khoih-prog/SAMD_Slow_PWM#3)
2. Fix `New Period` display bug. Check [random dropouts #4](khoih-prog/SAMD_Slow_PWM#4)
3. Update examples

v1.2.2 to replace `double` with `float`

### Releases v1.2.2

1. Use `float` for `DutyCycle` and `Freq`, `uint32_t` for `period`. 
2. Optimize code by not calculation in ISR

1.2.1 to to not update DutyCycle immediately

### Releases v1.2.1

1. DutyCycle to be optionally updated at the end current PWM period instead of immediately. Check [DutyCycle to be updated at the end current PWM period #2](khoih-prog/ESP8266_PWM#2)

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. Improve accuracy by using `double`, instead of `uint32_t` for `dutycycle`, `period`
4. Optimize library code by using `reference-passing` instead of `value-passing`
5. Fix reattachInterrupt() bug. Check [bugfix: reattachInterrupt() pass wrong frequency value to setFrequency() #19](khoih-prog/ESP8266TimerInterrupt#19)
6. Update examples accordingly

v1.1.0 to modify PWM settings on-the-fly

### Releases v1.1.0

1. Add functions to modify PWM settings on-the-fly
2. Add example to demo how to modify PWM settings on-the-fly

v1.0.0 for STM32F/L/H/G/WB/MP1 Slow PWM

### Initial Releases v1.0.0

1. Initial coding to support **STM32F/L/H/G/WB/MP1 boards** such as NUCLEO_H743ZI2, NUCLEO_L552ZE_Q, NUCLEO_F767ZI, BLUEPILL_F103CB, etc., using [`Arduino Core for STM32`](https://github.com/stm32duino/Arduino_Core_STM32)
2. The hybrid ISR-based PWM channels can generate from very low (much less than 1Hz) to highest PWM frequencies up to 1000Hz with acceptable accuracy.