Adding last_reset_type to sensors that should support it. (#2039)

esphome/components/pzemac/sensor.py

@@ -17,8 +17,8 @@ from esphome.const import (
     DEVICE_CLASS_ENERGY,
     ICON_EMPTY,
     ICON_CURRENT_AC,
+    LAST_RESET_TYPE_AUTO,
     STATE_CLASS_MEASUREMENT,
-    STATE_CLASS_NONE,
     UNIT_HERTZ,
     UNIT_VOLT,
     UNIT_AMPERE,
@@ -54,7 +54,8 @@ CONFIG_SCHEMA = (
                 ICON_EMPTY,
                 0,
                 DEVICE_CLASS_ENERGY,
-                STATE_CLASS_NONE,
+                STATE_CLASS_MEASUREMENT,
+                LAST_RESET_TYPE_AUTO,
             ),
             cv.Optional(CONF_FREQUENCY): sensor.sensor_schema(
                 UNIT_HERTZ,