update extractor test results

- don't run Instagram tests on Travis anymore
- replace Twitter test because timeline was made private
- update Hiperdex domain to '.com' (again ...)

test/test_results.py

@@ -26,6 +26,7 @@ TRAVIS_SKIP = {
     "archivedmoe", "archiveofsins", "thebarchive", "fireden", "4plebs",
     "sankaku", "idolcomplex", "mangahere", "readcomiconline", "mangadex",
     "sankakucomplex", "warosu", "fuskator", "patreon", "komikcast",
+    "instagram",
 }
 
 # temporary issues, etc.