Update python-slugify from 3.0.4 to 3.0.6
pytz==2019.3 # https://github.com/stub42/pytz
-python-slugify==3.0.4 # https://github.com/un33k/python-slugify
+python-slugify==3.0.6 # https://github.com/un33k/python-slugify
Pillow==6.2.0 # https://github.com/python-pillow/Pillow
{%- if cookiecutter.use_compressor == "y" %}
rcssmin==1.0.6{% if cookiecutter.windows == 'y' and cookiecutter.use_docker == 'n' %} --install-option="--without-c-extensions"{% endif %} # https://github.com/ndparker/rcssmin
