This updates the minimal supported version of CMake to 3.16, which in turn enables us to use more CMake features and have a cleaner build system.
This is the version that provides most new features and also the one we use in our latest docker image for CI.
* Original commit: espressif/esp-idf@facab8c5a7
Introduces a new example on ASIO to ilustrates on how to compose
async operation to build network related protocols.
* Original commit: espressif/esp-idf@2433816b14