Use the package retrieved from pip repository to run functional tests

[ki4070ma]

The problem

To prevent such like #542

Ideas

Build

$python setup.py bdist_wheel -> **NG** because there are not only py.typed but also webdriver.py and so on
$pip install dist/Appium_Python_Client-1.0.0-py3-none-any.whl
$pip show Appium-Python-Client
Name: Appium-Python-Client
Version: 1.0.0
Summary: Python client for Appium
Home-page: http://appium.io/
Author: Isaac Murchie
Author-email: [email protected]
License: Apache 2.0
Location: /Users/atsushimori/.pyenv/versions/3.8.1/lib/python3.8/site-packages
Requires: selenium
Required-by: 

Need to know how packages=find_packages(include=['appium']), works.

Use the package retrieved from pip install

TBU

References

https://packaging.python.org/tutorials/installing-packages/