Cast set_location arguments to float

[mykola-mokhnach]

Addresses #331

[KazuCocoa]

autopep8 exception happened, otherwise LGTM. thanks!

[nunessf]

Probably not the place to ask this, but when there might be a release including this update?

[KazuCocoa]

Just published the latest master as 0.37.
Please check it.

[nunessf]

I think it's missing an update on version.py file, because this exception is being thrown:

IOError: [Errno 2] No such file or directory: 'appium\version.py'

[KazuCocoa]

0.37 package had below python file.mm let me tweak related code.

[KazuCocoa]

I hope this works on your environment...

Below was my env downloaded the module from https://pypi.org/project/Appium-Python-Client/0.38/#files

>>> import appium.common.helper as h
>>> h.library_version()
'0.38'
``

[nunessf]

Alright, it's working now, I'm able to use set_location. Thank you!