v0.23

What's Changed

• Add static_checker to parser utils by @GlassOfWhiskey in #193
• refresh parsers by @mr-c in #196

Misc

• make ruamel.yaml requirement explicit by @mr-c in #190
• Offline graph-split test by @mr-c in #191
• git blame: ignore mass-reformatting by @mr-c in #194
• CI: use newer Singularity by @mr-c in #192
• readthedocs: install graphviz by @mr-c in #195
• prepare for 0.23 relelase by @mr-c in #197

Full Changelog: v0.22...v0.23