v0.12.0

What's Changed

• Bump version to v0.11.1 by @janmasrovira in #170
• add Semigroup by @janmasrovira in #171
• Add AppendList by @janmasrovira in #172
• Add pow by @janmasrovira in #173
• Update version to v0.12.0 by @janmasrovira in #174

Full Changelog: v0.11.1...v0.12.0