v0.4.0

• Merge branch 'master' of https://github.com/re-ce/rececss d1bfb54
• feat: add shadow to config 1589433
• docs: new config api 4c09419
• fix: config rules units a869397
• feat: add shadow rulesets 7635c42
• refactor: config rules be97e75

v0.3.0...v0.4.0