deps: pip-tools version in requirements, fixes #77#79

wesleyboar wants to merge 2 commits intodjango-cms:maindjango-cms/django-cms-quickstart:mainfrom

wesleyboar:fix/GH-77-error-using-requirementswesleyboar/django-cms-quickstart:fix/GH-77-error-using-requirementsCopy head branch name to clipboard