[Library manager] DHT12 library (Arduino, esp32 and esp8266)

[xreef]

Please read the Issues section of the Contributing Rules at the "Contributing" link to the right before submitting an issue report.

Source: https://github.com/xreef/DHT12_sensor_library
Tag: https://github.com/xreef/DHT12_sensor_library/releases/tag/v1.0.1

Please add the library.

DHT12 complete library (DHT clone library with same command and some addiction). I2c and OneWire support, connection schema of Arduino UNO, esp32 and esp8266 with examples.

Documentation: https://www.mischianti.org/2019/01/01/dht12-library-en/

Thanks Renzo

[cmaglie]

Done.