v0.26

What's Changed

• Bump mypy from 1.2.0 to 1.3.0 by @dependabot in #216
• Update ruamel-yaml requirement from <0.17.23,>=0.17.6 to >=0.17.6,<0.17.27 by @dependabot in #215
• prepare for 0.26 release by @mr-c in #217

Full Changelog: v0.25...v0.26