Add Support for 527E

[crgreenwood]

We recently bought:
https://www.dyson.co.uk/air-treatment/purifiers/dyson-purifier-hot-cool/dyson-purifier-hot-cool-white-silver
When I tried to setup the component the device was detected but could not be configured.
Running get_devices.py showed me "Device Type: 527E"

This pull request adds support for the 527E.

I tested this on my own installation and it works. I have not tested the modification to test_init.py but I copied this from the commit to add support for the 455.

[codecov]

Codecov Report

Merging #9 (fb6a427) into main (5a3ccbf) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main       #9   +/-   ##
=======================================
  Coverage   97.65%   97.65%           
=======================================
  Files          21       21           
  Lines         939      940    +1     
=======================================
+ Hits          917      918    +1     
  Misses         22       22           

Impacted Files	Coverage Δ
libdyson/__init__.py	100.00% <100.00%> (ø)
libdyson/const.py	100.00% <100.00%> (ø)

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[shenxn]

Thanks!

[shenxn]

New versions of libdyson and ha-dyson are released.