esp_netif component is a private requeirements for some freemodbus
sources. This works without declaring a depencency, since esp_netif is
implicitely dependent on esp_event. This will be cleaned up in IDF v5.0.
This change makes the depencency explicit.
Public header file of esp-modbus (freemodbus/port/port.h) includes
esp_timer.h, which is provided by esp_timer component. Currently
this works without declaring a dependency on esp_timer because
of a transitive dependency on esp_timer via freertos component.
This will be changed in IDF v5.0, where freertos will no longer
have a public dependency on esp_timer. This commit makes esp-modbus
compatible with that future change.
Alex Lisitsyn
Alexey Lapshin
David Cermak
Ivan Grokhotkov