Unitxt 1.16.1

• Fix typing notation for python 3.8 by @elronbandel in #1453
• Instance_metric and apply_metric keep only one instance at a time in mem, at the expense of repeated passes over input stream (2 times for instance_metric, #metrics for apply_metric) by @dafnapension in #1448
• simplify class parameter listing on web page by @dafnapension in #1454
• Bring code coverage tests back to life by @elronbandel in #1455
• Fix coverage tests by @elronbandel in #1456
• make demos_pool a local var rather than a separate stream by @dafnapension in #1436
• Adding upper case and last non empty line processor by @antonpibm in #1458
• performance by bluebench by @dafnapension in #1457
• Add UNITXT_MOCK_INFERENCE_MODE environment variable to performance workflow by @elronbandel in #1461
• remove redundant lines from performance.yml by @dafnapension in #1462
• Benjams/add bioasq miniwiki datasets by @BenjSz in #1460
• Add SocialIQA dataset by @elronbandel in #1468
• Add parallelization to RITS inference by @arielge in #1441
• Fix the type handeling for tasks to support string types by @elronbandel in #1470