Release version 0.1.0

[namurphy]

PlasmaPy-NEI is due for its first release in early 2021. Here's a partial list of release stuff that needs to be done beforehand. (This list doesn't include any issues that will need to be resolved.)

• Create a thing on PyPI for PlasmaPy-NEI
• Specify minimum version of PlasmaPy
• Reserve DOI on Zenodo
• Update codemeta.json
• Put version 0.1.0 on PyPI
• Upload 0.1.0 to Zenodo