What's new

Added 🎉

• Added new steps to datasets integration: ConcatenateDatasets ("datasets::concatenate") and InterleaveDatasets (datasets::interleave).
• Added __contains__ and __iter__ methods on DatasetDict so that it is now a Mapping class.
• Added tango info command that - among other things - displays which integrations are installed.

Commits

d47399d add 'tango info' command (#34)
80f8457 add interleave and concatenate dataset steps (#33)
10f56f7 add test for generics from std lib (#32)
f77837a make DatasetDict an actual Mapping (#30)