Release Name: v4.1.0 (v4.1.0)

Notes:
#### 🚀 Enhancement

- updated nidm model to collections of entities [#378](https://github.com/incf-nidash/PyNIDM/pu...) ([@dbkeator](https://github.com/dbkeator))

#### Authors: 1

- David Keator ([@dbkeator](https://github.com/dbkeator))