No module named 'pyserini.index.lucene' when index my own docs

[kakuibeyond]

desc:
when I index my own docs in google colab by following the instructions below, I met **No module named 'pyserini.index.lucene'**，and I insert a new code block with ‘import pyserini.index.lucene’, the problem still exist.
My steps are as follows:

1. !pip install pyserini==0.12.0
2. create jsonl docs like sample_collection_jsonl,and move to 'drive/MyDrive/data/passage_head2000.json'
3. mount my google drive
4. !python -m pyserini.index.lucene \ --collection JsonCollection \ --input drive/MyDrive/data/passage_head2000.json \ --index indexes/p1000_index \ --generator DefaultLuceneDocumentGenerator \ --threads 1

by the way, I have checked the source code in the repo, the dir 'pyserini/index/lucene/' do exist in this repo, so I really don't know why this error occurs, should I do something else?

[lintool]

Hi @kakuibeyond - use a newer version of pyserini, see https://github.com/castorini/pyserini/#release-history

We recently refactored the package structure.