Update PostNL unit of measure to align with UPS (#15023)

I'm using both the UPS and PostNL package trackers. I'd like to have the unit of measure to be the same, now they appear in two different graphs in the history view. 

If we prefer ```package(s)``` over ```package``` then I'll do a PR for [this line](https://github.com/home-assistant/home-assistant/blob/dev/homeassistant/components/sensor/ups.py#L81)
This commit is contained in:
Kees Schollaart 2018-06-18 05:57:08 +02:00 committed by Aaron Bach
parent cbdfc95cc8
commit 0e7e58f172

View File

@ -76,7 +76,7 @@ class PostNLSensor(Entity):
@property
def unit_of_measurement(self):
"""Return the unit of measurement of this entity, if any."""
return 'package(s)'
return 'packages'
@property
def device_state_attributes(self):