Depreciation warning from marisa_trie

[ewengillies]

Hello, thanks for this nice wrapper around marisa_trie. I am getting a warning when I run the code that one of the main marisa_trie methods should be replaced.

  /home/miniconda3/envs/db-manage/lib/python3.6/site-packages/trie_search/trie.py:44: DeprecationWarning: Trie.has_keys_with_prefix is deprecated and will be removed in marisa_trie 0.8.0. Please use Trie.i
terkeys instead.        

any chance this can be updated and pushed to the master (and to pip) soon? Thanks again!