Tags updated, added tests for tags

Added several sites
Updated socid_extractor version to avoid bug #150

tests/test_data.py

@@ -0,0 +1,15 @@
+"""Maigret data test functions"""
+
+from maigret.utils import is_country_tag
+from maigret.sites import SUPPORTED_TAGS
+
+
+def test_tags_validity(default_db):
+    unknown_tags = set()
+
+    for site in default_db.sites:
+        for tag in filter(lambda x: not is_country_tag(x), site.tags):
+            if tag not in SUPPORTED_TAGS:
+                unknown_tags.add(tag)
+
+    assert unknown_tags == set()