add URI_LIST attachment type. Use to attach clickable links to steps. (via #168)

Author: igogorek

allure-python-commons/src/types.py

@@ -38,6 +38,7 @@ def __init__(self, mime_type, extension):
     TEXT = ("text/plain", "txt")
     CSV = ("text/csv", "csv")
     TSV = ("text/tab-separated-values", "tsv")
+    URI_LIST = ("text/uri-list", "uri")
 
     HTML = ("application/html", "html")
     XML = ("application/xml", "xml")