v0.4.0

What's Changed

🚀 Other Features

• implement DatasetDict by @ArneBinder in #40
• Enter/ExitDataset(Dict)Mixin handling in map() by @ArneBinder in #43

🪲 Fixes

• fix text_lengths_collector.py by @ArneBinder in #44

Other Changes

• document processing by @ArneBinder in #42
• minor fixes by @ArneBinder in #45
• move document types to tests and fix export of processors by @ArneBinder in #46
• update version to 0.4.0 by @ArneBinder in #47

Full Changelog: v0.3.0...v0.4.0