v0.9.1

What's Changed

• add v0.9.0 changelog by @astafan8 in #250
• support typechecking with mypy 0.930 by @jenshnielsen in #253
• Convert plottr to a pep518 based installation by @jenshnielsen in #254
• Fix/swmrcrash by @wpfff in #255
• fix call to qt api with int by @jenshnielsen in #257
• enable numpy mypy plugin by @jenshnielsen in #259
• Add changelog for next release by @jenshnielsen in #258

Full Changelog: v0.9.0...v0.9.1