[twitter] add 'protected' metadata field (#5327)

for 'author' and 'user'

gallery_dl/extractor/twitter.py

@@ -380,6 +380,7 @@ class TwitterExtractor(Extractor):
             "date"            : text.parse_datetime(
                 uget("created_at"), "%a %b %d %H:%M:%S %z %Y"),
             "verified"        : uget("verified", False),
+            "protected"       : uget("protected", False),
             "profile_banner"  : uget("profile_banner_url", ""),
             "profile_image"   : uget(
                 "profile_image_url_https", "").replace("_normal.", "."),

test/results/twitter.py

@@ -72,6 +72,59 @@ __tests__ = (
     "#class"   : twitter.TwitterTimelineExtractor,
     "#range"   : "1-40",
     "#sha1_url": "c570ac1aae38ed1463be726cc46f31cac3d82a40",
+
+    "author": {
+        "date"            : "dt:2015-01-12 10:25:22",
+        "description"     : "The very best nature pictures.",
+        "favourites_count": int,
+        "followers_count" : int,
+        "friends_count"   : int,
+        "listed_count"    : int,
+        "media_count"     : int,
+        "statuses_count"  : int,
+        "id"              : 2976459548,
+        "location"        : "Earth",
+        "name"            : "supernaturepics",
+        "nick"            : "Nature Pictures",
+        "profile_banner"  : "https://pbs.twimg.com/profile_banners/2976459548/1421058583",
+        "profile_image"   : "https://pbs.twimg.com/profile_images/554585280938659841/FLVAlX18.jpeg",
+        "protected"       : False,
+        "verified"        : False,
+    },
+    "user": {
+        "date"            : "dt:2015-01-12 10:25:22",
+        "description"     : "The very best nature pictures.",
+        "favourites_count": int,
+        "followers_count" : int,
+        "friends_count"   : int,
+        "listed_count"    : int,
+        "media_count"     : int,
+        "statuses_count"  : int,
+        "id"              : 2976459548,
+        "location"        : "Earth",
+        "name"            : "supernaturepics",
+        "nick"            : "Nature Pictures",
+        "profile_banner"  : "https://pbs.twimg.com/profile_banners/2976459548/1421058583",
+        "profile_image"   : "https://pbs.twimg.com/profile_images/554585280938659841/FLVAlX18.jpeg",
+        "protected"       : False,
+        "verified"        : False,
+    },
+    "tweet_id"       : range(400000000000000000, 800000000000000000),
+    "conversation_id": range(400000000000000000, 800000000000000000),
+    "quote_id"       : 0,
+    "reply_id"       : 0,
+    "retweet_id"     : 0,
+    "count"          : range(1, 4),
+    "num"            : range(1, 4),
+    "favorite_count" : int,
+    "quote_count"    : int,
+    "reply_count"    : int,
+    "retweet_count"  : int,
+    "content"        : str,
+    "lang"           : str,
+    "date"           : "type:datetime",
+    "sensitive"      : False,
+    "source"         : "nature_pics",
 },
 
 {