Installs fails with pip10

[DomHudson]

Summary

Install currently fails with pip >= 10. This is because this line uses pip's .main API which is no longer present in the package.

See for for more details:
https://mail.python.org/pipermail/distutils-sig/2017-October/031642.html
pypa/pip#5191

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip-install-5ikhpkeg/pyfasttext/setup.py", line 18, in <module>
    ret = pip.main(['install', 'cysignals'])
AttributeError: module 'pip' has no attribute 'main'

[vrasneur]

Hello @DomHudson,

I have released a new version to fix that.

Can you retry with version 0.4.5?

Vincent

[DomHudson]

Thank you - the fix works.