Update dependencies

Pipfile

@@ -8,16 +8,17 @@ django = "<2.0,>=1.11"
 pillow = "*"
 coveralls = "*"
 dateparser = "*"
+django-cors-headers = "*"
 django-crispy-forms = "*"
 django-extensions = "*"
 django-filter = "*"
 django-flat-responsive = "*"
 djangorestframework = "*"
 factory-boy = "*"
-"flake8" = "*"
 filemagic = "*"
 fuzzywuzzy = {extras = ["speedup"], version = "==0.15.0"}
 gunicorn = "*"
+inotify-simple = "*"
 langdetect = "*"
 pdftotext = "*"
 pyocr = "*"