v0.3

What's Changed

• Bump pypa/gh-action-pypi-publish from 1.8.1 to 1.8.3 by @dependabot in #34
• Bump pypa/gh-action-pypi-publish from 1.8.3 to 1.8.4 by @dependabot in #35
• Bump pypa/gh-action-pypi-publish from 1.8.4 to 1.8.5 by @dependabot in #36
• Update get_covmat.py by @gcattan in #26
• Update version number by @gcattan in #39

Full Changelog: v0.2.1...v0.3