add PDF type in order to allow PDF attachments (via #265)

Author: hosniadala-dt

allure-python-commons/src/types.py

@@ -56,3 +56,5 @@ def __init__(self, mime_type, extension):
     MP4 = ("video/mp4", "mp4")
     OGG = ("video/ogg", "ogg")
     WEBM = ("video/webm", "webm")
+
+    PDF = ("application/pdf", "pdf")