Hsmodels

What's Changed
* ensure pydantic < v2 by devincowan in https://github.com/hydroshare/hsmodels/pull/43


**Full Changelog**: https://github.com/hydroshare/hsmodels/compare/0.5.5...0.5.6

What's Changed
* initial implementation of collection resource metadata by sblack-usu in https://github.com/hydroshare/hsmodels/pull/42
* add review_started and published as HSTERMS by devincowan in https://github.com/hydroshare/hsmodels/pull/41


**Full Changelog**: https://github.com/hydroshare/hsmodels/compare/0.5.4...0.5.5

What's Changed
* adding 'similar to' by devincowan in https://github.com/hydroshare/hsmodels/pull/34
* hydroshare.org allows empty value by sblack-usu in https://github.com/hydroshare/hsmodels/pull/40


**Full Changelog**: https://github.com/hydroshare/hsmodels/compare/0.5.3...0.5.4

What's Changed
* 35-Removing 'name' field of model program aggregation by pkdash in https://github.com/hydroshare/hsmodels/pull/36


**Full Changelog**: https://github.com/hydroshare/hsmodels/compare/0.5.2...0.5.3

What's Changed
* fix hydroshare_user_id parsing by sblack-usu in https://github.com/hydroshare/hsmodels/pull/33


**Full Changelog**: https://github.com/hydroshare/hsmodels/compare/0.5.1...0.5.2

**Full Changelog**: https://github.com/hydroshare/hsmodels/compare/0.4.6...0.5.1