Error on pip install for version 0.0.5

While installing `pygetwindow` using `pip install pygetwindow` I get the following error
But installing `pygetwindow==0.0.4` works fine.

```
Collecting pygetwindow
Using cached https://files.pythonhosted.org/packages/8c/95/d401a85c5e9a40fac545708961b38beb5a71c9a8fc607de30d31f03de17e/PyGetWindow-0.0.5.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-build-HxCiJ_/pygetwindow/setup.py", line 10, in
with open('README.md', 'r', encoding='utf-8') as fh:
TypeError: 'encoding' is an invalid keyword argument for this function
```

System details
```
Ubuntu 18.04.2 LTS
Python 2.7.15rc1
pip 9.0.1 from /usr/lib/python2.7/dist-packages (python 2.7)
Linux x86_64
```