* [pipeline] Allow for batch indexing when using Pipelines fix#1168
* [pipeline] Test case fixed fix#1168
* [file_converter] Path.suffix updated #1168
* [file_converter] meta can be one of these three cases:
A single dict that is applied to all files
One dict for each file being converted
None #1168
* [file_converter] mypy error fixed.
* [file_converter] mypy error fixed.
* [rest_api] batch file upload introduced in indexing API.
* [test_case] Test_api file upload parameter name updated.
* [ui] Streamlit file upload parameter updated.